Joe Rogan Experience #1342 - John Carmack

John Carmack sees standalone virtual reality as the future of personal computing. The Oculus Quest eliminates the need for a connected PC, external sensors, or additional hardware. Carmack said this was the experience Oculus had envisioned six years earlier: putting on a headset and immediately entering another world.

The Oculus Quest offers approximately two to three hours of battery life. Carmack estimated roughly two hours for demanding games and more than three hours for activities such as watching Netflix.

Watching ordinary television and video is one of VR's most popular uses. Netflix, YouTube, and Amazon Prime were among the popular applications on the earlier Oculus Go, despite expectations that immersive games would dominate the technology.

VR provides particular value to people living in small spaces. Someone occupying a tiny apartment in Tokyo can put on a headset and experience a spacious virtual ski lodge with an enormous television. Carmack argued that this benefit is less significant for someone who already owns an excellent home theater.

Carmack believes VR could eventually replace most conventional screens. Phones, tablets, televisions, laptops, and desktop monitors could ultimately give way to flexible virtual displays. Resolution, comfort, and extended wearing time remain important obstacles.

VR's long-term value extends beyond experiences that are impossible in real life. Carmack expects immersive technology to absorb ordinary activities people already perform on screens, making the headset a general-purpose computing device rather than merely gaming equipment.

Theme parks retain advantages that VR headsets cannot yet reproduce. Disney's Avatar attraction combines immersive visuals with physical movement, wind, and smells. Carmack explained that headsets can increasingly reproduce the visual and audio components, leaving physical sensations as the main reasons to visit specialized attractions.

Location-based VR experiences can justify expensive physical installations. Attractions such as The VOID combine virtual environments with real objects, motion, and sensations such as hot air representing nearby lava. Carmack believes home VR can reproduce much of the experience, but purpose-built attractions can still offer something additional.

Accurate virtual smells are considerably harder to reproduce than colors. Displays can produce their visible color range by combining red, green, and blue light, but smells depend on numerous different molecules rather than a comparable set of three primary components.

Early VR smell devices used replaceable scent cartridges. Carmack described a device attached underneath a headset that released small quantities of selected fragrances near the user's nose. Such systems could simulate a limited number of familiar smells but could not faithfully reproduce the thousands of scents in a natural environment.

A convincing artificial environment may not require perfect sensory accuracy. Carmack suggested that a few recognizable jungle smells might convince an ordinary city resident, even though someone deeply familiar with the actual environment would notice numerous missing details.

The limitations of early VR were obvious, but its potential was already visible. Rogan recalled trying an early, heavily pixelated Oculus headset and immediately recognizing that the experience could become transformative once resolution and responsiveness improved.

Matching real movements with virtual actions is central to convincing VR. Carmack singled out Beat Saber because swinging a controller produces the same basic movement as swinging the virtual saber. Small vibrations reinforce the illusion of contact.

Physical props can make virtual experiences more convincing than handheld controllers alone. Rogan described holding an actual Stormtrooper blaster at The VOID as substantially more immersive than pretending to hold objects using conventional VR controllers.

Haptic clothing has been proposed since the Doom and Quake era. Carmack recalled an entrepreneur who developed a leather jacket containing approximately eight or nine mechanical impact devices that struck the wearer when their game character was shot.

Carmack doubted that painful haptic clothing would become a mass-market product. Although impact devices could improve realism, he questioned how many consumers would enjoy repeatedly experiencing physical blows during gameplay.

Releasing old game source code allows enthusiasts to build experiences the original developers rejected. Carmack noted that modern programmers can modify Doom or Quake to support experimental hardware without securing approval from him or the original development team.

Wolfenstein 3D players began modifying the game without official development tools. Fans reverse-engineered compressed game data, disassembled code, developed level editors, and replaced characters, including modifications that substituted Barney the Dinosaur for Hitler.

Fan modifications directly influenced Doom's technical design. Carmack recognized that players wanted to continue creating experiences after finishing Wolfenstein, so supporting modifications became an explicit engineering objective for Doom.

Doom introduced organized support for user-created content through WAD files. Its WAD and PWAD formats allowed players to replace game assets and create new levels. Carmack's team documented the formats and released tools and some supporting code.

Doom's original level editor was built on expensive NeXT workstations. Although the team released its source code, ordinary players needed other programmers to develop practical PC-compatible editing tools.

Quake expanded modification support from changing content to changing gameplay. Carmack introduced QuakeC, allowing players to develop new rules and game modes rather than merely replacing graphics, levels, and sounds.

Quake's modding capabilities helped produce Capture the Flag and Team Fortress. These community-created modes demonstrated how access to gameplay programming could extend a game's appeal far beyond its original design.

Carmack wanted to release complete source code because modification tools still imposed limitations. Giving programmers access to the entire engine would allow new games, deeper modifications, and ports to additional platforms.

Id Software initially resisted giving away its source code. Businesspeople, artists, and designers feared helping competitors by releasing technology the company had invested heavily in developing.

Carmack established a policy of releasing previous-generation engines after newer technology shipped. Wolfenstein's source followed Doom, Doom's followed Quake, and Quake's followed later games. This preserved the commercial value of newer technology while extending the life of older titles.

Carmack used his influence inside id Software to protect the source-code release policy. Some colleagues regarded it as his personal initiative and disagreed with it. He nevertheless considered it one of his most worthwhile decisions.

Id Software partner Kevin Cloud eventually acknowledged that releasing the source code had been the right decision. Carmack considered this particularly satisfying because the policy had initially faced considerable internal resistance.

Doom's open source availability gave the game a life far beyond its original platforms. Enthusiasts have ported it to numerous devices with suitable processors and displays. Carmack expects its code to remain usable and historically important for generations.

Most game companies embraced modding without fully embracing open source. Carmack expressed disappointment that relatively few developers were willing to release complete engine source code, despite the benefits he had observed.

Competitive Quake players deliberately reduced graphical quality to gain advantages. Removing textures could increase frame rates and reduce input latency, particularly on early graphics cards.

Simplified graphics also made opponents easier to detect. Nearly textureless environments improved contrast, allowing skilled players to identify moving enemies more quickly. Carmack recognized the competitive advantage but disliked how it undermined the artists' work.

Early Quake tournaments imposed minimum visual-quality requirements. Carmack wanted spectators encountering the game for the first time to see something reasonably attractive rather than a blurry or nearly textureless environment.

Carmack gave away his personal Ferrari 328 as the grand prize of the Red Annihilation Quake tournament. He considered the prize extravagantly generous and expected it to remain unmatched for years.

Competitive gaming's financial growth surprised Carmack. Only about a year after his Ferrari giveaway, another tournament offered approximately $100,000. The industry subsequently developed professional players with celebrity status and substantial earnings.

Dennis “Thresh” Fong won Carmack's Ferrari. Thresh became one of Quake's earliest celebrated professional players, and recordings of his gameplay allowed ordinary players to study his movements, tactics, and decision-making.

Dota and League of Legends demonstrated how much larger competitive gaming could become. Carmack pointed to enormous overseas audiences, particularly in South Korea, and major tournament prize money that far exceeded what early Quake competitors received.

Quake's competitive design naturally produces extreme differences in scores. A superior player can control weapons, armor, health, and strategic positions, preventing an opponent from recovering and producing matches with scores such as 20–1.

Regenerating health pickups amplify even small differences in player skill. A player who is only slightly better can win an engagement, restore health, and repeat the advantage indefinitely. Carmack explained that without such recovery opportunities, weaker opponents could gradually wear stronger players down.

Quake requires players to master resource management as well as aiming. High-level competitors memorize weapon locations, armor pickups, health locations, and item respawn intervals. They move through maps to collect valuable resources just as those resources become available.

Map control can matter more than individual firefights. Strong players deny opponents access to rocket launchers, railguns, armor, and health, steadily increasing their advantage before a direct encounter even occurs.

The gap between good amateur players and professionals can be enormous. Carmack observed that someone who dominates friends locally may be almost completely helpless against top-level competitors.

Team-based games are more welcoming to beginners than Quake's one-on-one competition. Carmack used Overwatch as an example because weaker players can participate in victories while gradually learning to make meaningful contributions.

Quake's unforgiving difficulty was not entirely intentional. Carmack recognized retrospectively that its underlying systems created brutal competition, although that distinctive character also became a major part of the game's appeal.

Modern games often offer greater technical quality but less unusual design. Carmack acknowledged the extraordinary work behind contemporary titles while observing that budgets reaching hundreds of millions of dollars encourage publishers to pursue broad appeal and avoid risky ideas.

Older games benefited from having fewer commercial constraints. Smaller budgets and less formal market testing sometimes allowed developers to create unconventional experiences that might struggle to receive approval inside a modern major studio.

Extreme engagement with games or programming can continue during sleep. Carmack recalled periods of working approximately 13 hours daily on unfamiliar technologies and dreaming about the problems afterward. He regarded these experiences as signs of deep learning and mental absorption.

Rogan experienced similar effects during intense Quake sessions. Playing for several hours daily led to dreams about navigating maps and avoiding rockets, while multiplayer sessions sometimes left him physically exhausted and his heart racing.

VR can change how experiences are stored in memory. While playing Minecraft in VR with his family, Carmack sometimes later remembered having physically occupied a cavern or witnessed events in that environment, rather than remembering playing a conventional video game.

Motion sickness is a fundamental obstacle to bringing traditional shooters into VR. Rapid turning, acceleration, and complex movement create conflicts between visual information and the body's vestibular system.

Movement that matches the user's real body is generally more comfortable. Standing, physically walking, and relatively steady movement create fewer problems than simulated spinning, sudden acceleration, or flying along curved paths.

Quake's rocket jumping would be particularly difficult to reproduce comfortably in VR. Carmack explained that repeated simulated airborne movement could quickly make players sick, even when the experience itself seemed exciting.

Simulator sickness can occur with conventional monitors too. Carmack recalled people becoming nauseated while playing Doom or Quake, particularly when large displays and realistic fields of view persuaded the brain to interpret virtual movement as physical movement.

A small monitor usually causes fewer motion conflicts because the surrounding room remains visible. Carmack contrasted a game's roughly 90-degree virtual field of view with a small monitor occupying perhaps 25 degrees of the viewer's actual vision.

A stable virtual cockpit or surrounding structure can reduce motion sickness. Some VR applications maintain stationary visual references, helping users tolerate movement that would otherwise be uncomfortable.

Omega Agent demonstrated the trade-off between exciting movement and comfort. The jetpack game allows simulated flight and arcing movement that Carmack considered especially likely to cause sickness, yet the experience remained compelling to some players.

Carmack prefers VR experiences that do not require users to tolerate physical discomfort. He nevertheless acknowledged that enthusiasts may willingly accept nausea or other drawbacks to experience unusual forms of movement.

Physical injury was a major safety concern during Oculus Quest development. Unlike seated VR, room-scale experiences allow people to walk, turn, crouch, and swing their arms while unable to see nearby furniture and walls.

Oculus developed Guardian to establish safe movement boundaries. Users trace a permitted area when setting up the headset, and the system displays a warning overlay as they approach its edges.

Guardian's effectiveness depends partly on users accurately defining safe spaces. Carmack acknowledged that someone who includes a staircase or furniture inside the designated area can still suffer an accident.

Oculus experimented with predicting dangerous movements before they happened. Guardian could estimate whether the speed of a user's hand would carry it into a boundary and display warnings earlier.

More aggressive safety warnings created usability problems. Players complained that predictive boundary overlays interrupted immersion, forcing Oculus to balance protection against distractions.

Some developers deliberately disabled or weakened Guardian. Carmack acknowledged that users sometimes accepted additional risks to avoid interruptions, creating difficult questions about product safety and responsibility.

Oculus employees themselves occasionally injured their hands while testing VR. Carmack mentioned developers striking tables or other objects when safety boundaries were configured too generously.

The Quest uses four outward-facing cameras for position tracking. The cameras identify stable environmental features to calculate headset movement without external tracking equipment.

The same cameras track handheld controllers using infrared LEDs. This allows the Quest to determine controller positions while maintaining a relatively compact standalone design.

Quest's passthrough mode uses black-and-white camera imagery to show the real world. Although low-resolution and lacking color, it helps users locate controllers, identify obstacles, and regain their physical orientation.

Long VR sessions can leave users disoriented within their own rooms. Carmack noted that people sometimes remove their headsets and discover they are facing the opposite direction or standing in a different corner from where they expected.

Large-scale physical walking produces unusually convincing VR experiences. Carmack described exploring an approximately 50-foot-long virtual sculpture at a convention, physically walking through rooms and crawling into new spaces.

Most households lack sufficient space for truly large virtual environments. Carmack regarded warehouse-sized physical exploration as impressive but difficult to offer as a normal home experience.

Outdoor Quest tracking is limited by bright sunlight. Strong daylight can overwhelm the infrared signals from controllers, even when the headset's cameras can still detect surrounding environmental features.

Overcast conditions can make outdoor VR more practical. Carmack described enthusiasts using tennis courts and large fields for substantial walking environments when lighting conditions permitted.

Facebook Reality Labs had developed sophisticated environmental-scanning technology. Research systems could reconstruct cluttered rooms in three dimensions with enough accuracy to identify individual objects.

Detailed environmental reconstruction was too expensive for the Quest generation. Carmack cited additional sensors, structured-light projection, and significant computational requirements as obstacles.

Oculus ultimately wanted to eliminate manual Guardian setup. Carmack envisioned headsets that automatically understand their surroundings, recognize hazards, and allow users to begin VR experiences without drawing safety boundaries.

True augmented-reality glasses still faced major unresolved display challenges. Carmack distinguished lightweight, transparent AR glasses from headsets that show the world through cameras.

Camera-based augmented reality was technically easier than building ideal transparent glasses. Carmack believed higher-resolution color cameras and faster displays could substantially improve passthrough AR without solving every problem involved in see-through optics.

Social acceptability was another major obstacle to wearable AR. Carmack questioned whether people would wear bulky headsets on buses or throughout ordinary daily activities, even if the devices worked well.

Carmack was skeptical that medium-sized AR goggles would become everyday devices. He believed sunglasses-sized hardware could eventually be compelling but doubted that people would routinely wear something resembling swimming goggles or compact ski goggles.

Carmack remained unconvinced by many augmented-reality demonstrations. Effects such as flooding a room with simulated water or transforming its appearance were technically interesting but did not establish a strong everyday use case.

Pokémon Go succeeded without relying heavily on sophisticated augmented reality. Carmack treated it as evidence that compelling software and gameplay can matter more than elaborate visual overlays.

Carmack favored fully immersive VR over most contemporary AR applications. His preference reflected the absence of AR experiences he considered genuinely useful, rather than a belief that augmented reality was technically impossible.

Magic Leap's promotional videos created expectations beyond its actual hardware capabilities. Carmack criticized synthetic demonstrations that encouraged consumers to believe the product could deliver experiences it could not yet reproduce.

Microsoft's HoloLens had found practical value in specialized industrial work. Carmack identified professional training and tasks such as servicing jet engines as legitimate applications despite high equipment costs.

HoloLens's narrow field of view and price limited its appeal for consumer entertainment. Devices costing thousands of dollars could still be justified when they helped highly paid specialists perform valuable work.

Carmack wanted AR glasses to function as everyday personal extensions rather than specialized tools. His ideal device would replace ordinary glasses and remain useful for roughly 16–18 hours, rather than offering only a couple of hours of operation.

Instant access to enhanced vision could itself justify an AR product. Carmack proposed glasses that let users zoom in on distant objects through an effortless command, even before developing more elaborate overlays.

Brain-computer interfaces could make future devices feel like natural extensions of the body. Carmack considered thought-controlled zooming, eye tracking, wrist movements, and other low-latency control mechanisms as possibilities for intuitive interaction.

Carmack spent an entire day visiting Elon Musk's Neuralink shortly before its public presentation. He met with technical staff and examined the company's approach to connecting computers directly to the brain.

Carmack considered Neuralink genuinely ambitious rather than merely an incremental improvement. The possibility of direct electronic input and output through the brain represented a substantial departure from ordinary computing interfaces.

Neuralink's approach aimed to connect with far more neural signals than earlier experiments. Carmack contrasted traditional systems involving one or a few electrodes with Neuralink's plans involving tens of thousands of connections.

Neuralink's initial medical applications appeared more achievable than radically enhancing healthy people. Carmack expected meaningful progress for people with profound disabilities and certain neurological conditions, potentially allowing direct control of computers.

Implant longevity remained a serious unsolved problem. Carmack noted that implanted devices can eventually lose effectiveness because of the brain's biological response, requiring better materials, coatings, and implantation techniques.

High-bandwidth implants could enable much richer control than moving a cursor. Carmack envisioned moving beyond slow pointer manipulation toward simultaneous, multidimensional control comparable in complexity to playing a musical instrument.

Sending information directly into the brain could eventually become as important as extracting signals. Carmack saw potential for artificial sensations and new kinds of feedback, although these remained speculative possibilities.

Carmack questioned Neuralink's proposed role in keeping humans competitive with advanced AI. He understood Musk's concern that artificial intelligence could surpass humanity, but doubted that adding neural connections to a human would close the gap with far larger artificial systems.

Carmack predicted that artificial general intelligence might show recognizable signs within approximately ten years of the interview. He acknowledged his optimism and noted that many researchers expected development to take several decades or longer.

Carmack believed human intelligence could ultimately be reproduced computationally. His position was based on materialism: the brain is a physical system, and he saw no fundamental reason an artificial system could not replicate its relevant processes.

The human brain's estimated 85 billion neurons do not necessarily imply an equivalent number of artificial components. Carmack argued that computing systems might reproduce relevant functions more efficiently than biology, just as some visual-processing tasks require fewer electronic components than biological neurons.

Carmack thought sufficient raw computing power for AGI might already exist in major supercomputers. He suggested that appropriate algorithms, training methods, and enough experimentation could matter more than simply waiting for hardware to become faster.

High-performance computers are not automatically faster at ordinary programs. Carmack explained that many single-threaded applications run best on high-end gaming computers rather than enormous supercomputers.

Modern supercomputers became more relevant to AI because machine learning can exploit massive parallel processing. Workloads involving large numbers of matrix calculations are much better suited to clusters of CPUs and GPUs than many traditional software tasks.

Id Software once operated computing equipment approaching the supercomputer rankings for level-building work. Carmack recalled the lengthy calculations required to process game maps and his efforts to improve those workflows.

AI progress depends heavily on making experiments cheap enough to repeat. Carmack emphasized that difficult breakthroughs often occur only after many researchers try different approaches, fail repeatedly, and eventually discover what works.

Carmack was not convinced quantum computing would broadly accelerate artificial intelligence. He acknowledged limited personal expertise and had not yet worked through the quantum programming exercises he wanted to study.

Quantum computing's potential to undermine conventional encryption worried Carmack. He considered it unfortunate that a technology might become excellent at breaking important cryptographic systems without necessarily improving everyday computing tasks.

A sufficiently powerful quantum computer could threaten widely used digital security systems. Carmack discussed the possibility of breaking certain encryption methods, digital signatures, and public-key authentication, potentially disrupting secure communications.

Carmack explained that properly implemented one-time-pad encryption is mathematically unbreakable. Its practical drawback is that communicating parties must securely possess enough genuinely random key material, which cannot be reused.

Increasing data-storage capacity could make enormous one-time pads more practical. Carmack speculated that people might someday carry or even implant secure stores of random key material if conventional encryption faced catastrophic attacks.

Some enthusiasts were already implanting ordinary electronic chips into their bodies. Carmack cited an example involving a Tesla access chip placed under the skin to unlock a vehicle.

Carmack believed programmers experimenting directly with their own brain-computer interfaces could accelerate development. Someone capable of modifying the interface software while personally experiencing its effects might learn much faster than researchers conducting occasional laboratory sessions with patients.

Self-experimentation with neural implants carries serious medical risks. Carmack recalled a researcher who arranged to have electrodes surgically implanted in his own brain outside ordinary medical oversight and subsequently experienced speech and facial-movement complications.

Carmack proposed adapting ordinary mobile computing hardware to neural interfaces. He suggested that signals from a brain implant could be organized like camera inputs and display outputs, allowing existing Qualcomm-style processors and interfaces to handle some of the computation.

Carmack had rejected numerous VR business proposals during the Wolfenstein, Doom, and Quake years. Entrepreneurs wanted to license game technology for headsets, but he believed their hardware was too primitive to deliver convincing experiences.

The early VR industry's problem was not simply the absence of interesting content. Carmack said some companies had enthusiasm but lacked the technical capabilities required to achieve acceptable displays, tracking, and performance.

Expensive early VR systems could cost tens of thousands or even around $150,000 without producing excellent experiences. Carmack was frustrated that specialized equipment remained far below what he believed contemporary technology could deliver.

Carmack began investigating modern VR around 2011 after completing Rage. He expected two decades of hardware progress to have solved the problems he remembered from the 1990s but discovered that available systems remained surprisingly inadequate.

Carmack's dissatisfaction with existing VR hardware led him to assemble his own solutions. This work brought him into contact with Palmer Luckey and helped establish the technical direction that eventually led to his involvement with Oculus.

Carmack regarded his Doom 3 VR demonstration at E3 as an important turning point. He believed it helped convince the wider industry that modern virtual reality could become a practical consumer technology.

A high-end gaming PC had approximately fifty times the computing power of the standalone mobile VR hardware Carmack was discussing. This made advanced graphics far easier to produce on connected systems than on lightweight headsets.

Carmack deliberately concentrated on mobile VR because its constraints were harder to overcome. He enjoyed optimization challenges and believed portable, self-contained devices were important enough to justify the additional engineering effort.

Carmack warned that decades of effortless computing-performance growth were approaching physical limits. Developers could no longer safely assume that waiting another decade would make extremely demanding software run comfortably on small mobile devices.

Semiconductor manufacturing was approaching atomic-scale constraints. Carmack explained that chip components had become so small that quantum effects, including electron tunneling, increasingly complicated further miniaturization.

Quantum tunneling creates the possibility of errors when electrons cross unintended boundaries. Carmack described how even individually unlikely events become significant when enormous numbers of electrons are involved.

Error-correcting techniques can compensate for unreliable physical processes. Carmack noted that communications systems already employ methods that recover correct information despite errors, although relying increasingly on such techniques changes traditional expectations of computing reliability.

Advanced semiconductor fabrication had become extraordinarily expensive. New factories could cost billions of dollars, leaving only a small number of companies, including TSMC, Samsung, and Intel, operating at the technological frontier.

Carmack expected further improvements in chip performance but not endless traditional scaling. He anticipated additional manufacturing advances while regarding the ultimate limitations of conventional silicon technology as increasingly visible.

Carbon nanotubes and photonic computing were possible alternatives to conventional chip scaling. Carmack considered them interesting but insufficiently established to rely on as certain solutions.

The approaching limits of Moore's law increase the importance of software efficiency. Carmack argued that developers must pay more attention to performance instead of depending on increasingly powerful hardware to compensate for inefficient code.

5G's most direct consumer benefits were higher bandwidth and lower latency. Carmack questioned attempts to market it as a transformative VR technology when many VR applications require little or no continuous network traffic.

Beat Saber illustrated why 5G would not automatically improve VR games. Carmack explained that the application performs its gameplay locally and needs little network activity beyond functions such as leaderboard updates.

Higher bandwidth could improve immersive video delivery. Carmack considered 360-degree stereoscopic media a more plausible beneficiary of faster cellular connections, though not an application fundamentally impossible without 5G.

Cloud gaming could become more practical with lower-latency cellular networks. Games running in remote data centers might stream to users with delays small enough to become difficult to notice under suitable conditions.

Telecommunications companies needed compelling applications to justify expensive 5G upgrades. Carmack noted that replacing infrastructure across large networks requires substantial capital investment, creating pressure to promote exciting consumer benefits.

Carmack viewed social media very differently from people who found it consistently upsetting. His Twitter feed exposed him to scientific discoveries, exceptional engineering, interesting art, and people developing new products.

Carmack acknowledged that social media can produce anger, addiction, and unhealthy behavior. He nevertheless said his own experience was overwhelmingly positive and admitted he was not especially qualified to solve broader social problems.

Carmack believed digital connections can be especially valuable to people with limited offline opportunities. Someone living in an isolated town can discover friends, communities, and interests that would otherwise remain inaccessible.

Criticism of digital life can overlook differences in people's real-world circumstances. Carmack argued that someone with an exciting, privileged life might undervalue virtual experiences that substantially improve another person's daily existence.

Carmack considered global connectivity beneficial overall despite its problems. He believed the advantages of connecting people who would otherwise never meet would ultimately outweigh many of the negative consequences.

Carmack believed Facebook's leadership genuinely valued its mission of connecting people. He specifically defended Mark Zuckerberg and other executives against the assumption that their stated mission was merely corporate publicity.

Carmack described himself as an introvert who spends substantial time working alone. He accepted that his thinking and social preferences differed from many people's and said recognizing those differences helped him avoid unnecessary frustration.

Carmack's preferred working schedule was approximately 60 hours weekly. Family responsibilities sometimes reduced that figure, but he said working fewer than 50 hours made him feel insufficiently productive.

Carmack rejected the idea that he routinely worked 18-hour days. He said his effective productivity dropped sharply beyond approximately 13 hours of computer work.

Switching between several tasks helped Carmack sustain long productive days. He found that moving among different problems was more effective than spending every hour struggling with one issue.

Eight hours of sleep was an important requirement for Carmack's performance. He argued that sacrificing sleep eventually undermined productivity rather than increasing useful working time.

Only about half of Carmack's time at Oculus or Facebook was spent programming. The remainder involved meetings, technical persuasion, strategic discussions, and attempts to influence organizational decisions.

Carmack deliberately avoided becoming a conventional manager. He believed he could provide technical leadership and inspire colleagues by example but did not consider himself particularly skilled at managing individual employees.

Carmack occasionally isolated himself for week-long programming retreats. With his family's agreement, he sometimes traveled alone to hotels, avoided distractions, limited internet use, and concentrated almost entirely on technical work.

Carmack found that his intensive programming ability returned quickly during retreats. After an adjustment period of approximately one day, he could resume working around 13 productive hours daily.

One recent retreat focused on artificial intelligence research. Carmack particularly enjoyed exploring unfamiliar technical fields and experiencing moments when complicated ideas suddenly became understandable.

Carmack consciously chose technical craftsmanship over maximizing his managerial influence. He recognized that directing teams could potentially accomplish more at scale but preferred personally building and understanding systems.

He accepted that remaining an engineer might prevent him from becoming a billionaire. Carmack considered that a worthwhile trade-off if it allowed him to continue work he genuinely loved.

Carmack worried that moving permanently into management would weaken his engineering abilities. Without continuous technical involvement, he expected his knowledge to become outdated, eventually reducing his usefulness even as a technical decision-maker.

Carmack contrasted his choice with Mark Zuckerberg's career. He believed Zuckerberg deliberately moved away from programming to become an effective CEO and learn the skills required to run Facebook.

Carmack believed Elon Musk faced a similar tension between engineering and management. Musk remained technically involved, but coordinating multiple companies consumed much of his attention. Carmack recalled Musk speaking wistfully about earlier days spent directly programming.

Game development often offers worse working conditions than employment at major technology companies. Carmack described lower pay, weaker job security, and more intense workloads compared with employers such as Facebook, Google, Apple, and Microsoft.

Passion-driven industries can demand exceptional effort while paying less. Carmack compared game development with artistic and musical careers, where people's strong desire to participate affects employment conditions.

Carmack believed some exceptional games existed because developers willingly worked extraordinarily hard. He argued that obsession and sustained effort can enable work that would otherwise be commercially impossible.

Carmack opposed restricting individuals who voluntarily choose demanding work schedules. He defended their right to pursue ambitious goals, while acknowledging that critics raised legitimate questions about exploitation and workplace pressure.

Carmack recognized that his own employment experience was unusual. As a company founder, he enjoyed freedom that junior employees at large studios might not have, and he had never personally worked inside a major EA or Activision development organization.

Michael Abrash demonstrated that excellent game developers did not necessarily need extreme schedules. Abrash, a former Microsoft engineer who worked closely with Carmack on Quake, maintained a comparatively normal family-oriented schedule while making contributions everyone respected.

Carmack questioned whether studios would dismiss exceptional employees merely for working conventional hours. He suspected demonstrated productivity often mattered more than time spent at the office, although he acknowledged lacking direct knowledge of every company's practices.

Carmack did not expect omnidirectional VR treadmills to become major home products. Although they address some movement limitations, he believed large physical installations undermine the convenience that makes standalone VR attractive.

Carmack considered warehouse-based VR a better setting for specialized movement equipment. Large attractions could justify treadmills, physical weapons, and environmental structures more easily than ordinary households.

Beat Saber provided Carmack with meaningful physical exercise. He played regularly and reported finishing demanding sessions drenched in sweat, allowing him to combine entertainment with part of his exercise routine.

Carmack and his son experimented with wearing additional weights while playing Beat Saber. Adding approximately five-pound weights forced more deliberate arm movements and increased the physical demands of the game.

VR boxing games provide excellent exercise but lack real impact. Carmack said shadowboxing against virtual opponents is physically demanding, yet the absence of contact weakens the illusion that punches actually land.

Carmack proposed stronger haptic feedback using stored mechanical energy. Instead of relying exclusively on small vibration motors, he suggested that spring-driven mechanisms could produce sharp impacts that feel more like connecting with a target.

VR boxing gloves could potentially provide both resistance and improved haptics. Rogan suggested gloves with added weight and internal feedback mechanisms, addressing both exercise intensity and the sensation of contact.

Carmack considered immersive instructional video a promising application for martial arts. Stereoscopic video could show body positions, grips, and leverage more clearly than conventional footage.

Controlling time within VR could make technical training more effective. Carmack described pausing complex physical movements, advancing frame by frame, and reversing action while maintaining a realistic sense of spatial depth.

Judo instruction was a particularly relevant example. Carmack observed that elite competitors sometimes execute techniques too quickly for students to understand their mechanics through ordinary video playback.

VR training can improve attention as well as visualization. Carmack noted that someone wearing a headset is less able to look at a phone or become distracted during instruction.

Walmart was already using VR extensively for employee training. Carmack identified it as an example of a major organization finding practical value in immersive instructional experiences.

American football teams were using VR to rehearse plays and improve recognition. Carmack described the value of seeing how a play should develop from a realistic viewpoint before attempting it physically.

VR could enhance striking and weapons training even without physical contact. Carmack considered movement, reaction, distance, and situational awareness useful training targets, while recognizing that grappling is harder to simulate without a physical partner.

Augmented reality could assist martial arts instruction by showing correct body positions. Carmack proposed overlays demonstrating where an arm or leg should move while the student practices with a real person.

Oculus demonstrated a shared, warehouse-scale VR experience using Dead and Buried. At Oculus Connect, several participants occupied the same large physical space while playing a Western-themed shooting game.

The shared VR demonstration incorporated real physical cover. Players could crouch behind and touch actual objects that corresponded to structures inside the virtual world.

A spectator could inspect the shared virtual environment using a tablet. The tablet acted as a window into the digitally rendered game, allowing someone outside the headsets to see the participants and environment.

Carmack described the warehouse demonstration as impressive but technically improvised. It proved the experience could work, although substantial engineering remained before it could become a polished commercial product.

Full-body tracking could eventually eliminate handheld controllers. Carmack anticipated computer-vision systems capable of determining a player's movements from cameras alone.

Large multiplayer VR arenas were becoming commercially plausible. Carmack said the technology no longer required fundamental scientific breakthroughs, although tracking infrastructure, product integration, and operational challenges remained.

Commercial VR arenas could require investments of tens of millions of dollars. Carmack regarded financing and workable business models as increasingly important obstacles, rather than the fundamental possibility of the technology.

Third-party attractions often needed their own tracking systems. Carmack explained that Oculus had not yet exposed all the technical capabilities developers needed for extremely large shared environments, forcing companies such as The VOID to build additional systems.

Carmack expected Oculus eventually to make large-scale VR deployment easier. He anticipated more accessible commercial tools that would reduce the amount of custom engineering required.

Carmack wrestled and practiced YMCA-level judo while growing up in Missouri. He described himself as competent rather than exceptional, commonly finishing around second place in competitions.

Teenage wrestling and judo injuries caused Carmack long-term knee problems. He attributed some limitations in his later leg training to injuries suffered during those years.

Carmack returned to judo in his thirties. He joined Becerra Judo, run by a former Cuban Olympian, and encountered a much more demanding training environment than the recreational classes of his youth.

His early return exposed weaknesses in his grappling knowledge. Although wrestling instincts helped him maintain positions, more experienced opponents repeatedly caught him in armbars that he had never learned to defend properly.

Carmack approached martial arts improvement through intensive study. He acquired instructional material, studied unfamiliar techniques, and deliberately practiced the areas where opponents had been defeating him.

Carmack's wife gave him a year of private lessons with Carlos Machado as a Christmas present. This became an important turning point in his grappling development.

Carmack trained with Carlos Machado at his Armadillo Aerospace facility. The building had sufficient space for mats, allowing Saturday sessions with Machado and other training partners.

Private training significantly improved Carmack's submission skills. He developed an effective straight armbar that became his preferred technique and regularly surprised opponents at his judo club.

Carmack maintained an unusually demanding grappling schedule for a period. He combined club training, separate sessions with a coach, and private lessons with Machado.

Carmack described his own grappling as tense and aggressive. He contrasted his approach with Machado's relaxed, fluid style, in which the expert appeared to offer opportunities while quietly preventing every meaningful attack.

A visit to Tokyo's Kodokan exposed Carmack to a different kind of grappling mastery. He rolled with an older Japanese judoka whose control left him feeling almost completely immobilized before eventually being submitted.

Carmack considered grappling valuable beyond competition. He believed experiencing physical resistance, defeat, effort, and personal limits teaches lessons that purely intellectual activities cannot fully provide.

Carmack encountered surprise that a computer engineer enjoyed combat sports. He recalled a young student questioning why someone like him attended judo classes, illustrating the stereotypes surrounding technical professionals.

Carmack rejected the assumption that an interest in combat sports conflicts with intellectual work. He valued the physical challenges and psychological lessons of grappling and saw no contradiction between engineering and martial arts.

Carmack's wife discouraged him from driving Ferraris to judo practice. The club was located in a rougher area of town, and she preferred that he leave his expensive cars elsewhere.

Carmack was not particularly interested in cars during childhood. Computers mattered more to him, and he would have preferred a new Apple computer to an expensive sports car.

Carmack's first car was an ordinary Volkswagen Jetta. His interest in automotive engineering developed later, after encountering an old British MGB.

A British MGB introduced Carmack to hands-on car modification. Its frequent mechanical problems, including a failed clutch master cylinder on his first day of ownership, forced him to learn maintenance and engine tuning.

Carmack studied automotive engineering much as he studied programming. He worked through enthusiast publications and increasingly technical material while experimenting with engine performance.

Carmack replaced the unreliable MGB with a Mazda Miata. He appreciated it as a more modern and dependable expression of the lightweight British sports-car concept.

Carmack bought his first Ferrari while still very young and working in the Wolfenstein era. He visited a Dallas dealership wearing casual clothes and chose a Ferrari 328 that appealed to him more than the newer models on display.

A Ferrari salesman's warning helped inspire Carmack's obsession with increasing horsepower. The salesman effectively suggested avoiding acceleration contests with Corvettes, revealing that the car's actual performance might not match its reputation.

Most Ferrari specialists resisted modifying Carmack's 328. Local shops generally treated engine modifications as unacceptable and suggested little beyond minor exhaust upgrades.

John Romero indirectly introduced Carmack to the specialist who transformed his Ferraris. Romero brought an automotive magazine to the office containing an article about a Dallas performance business run by Bob Norwood.

Bob Norwood immediately proposed turbocharging Carmack's Ferrari 328. Carmack had been searching for someone willing to pursue genuine performance improvements, and their conversation began a lengthy engineering collaboration.

Carmack's Ferrari 328 was pushed toward approximately 500 horsepower before suffering engine failure. The modifications involved turbochargers, electronic engine management, and repeated experimentation beyond the car's original design limits.

Carmack accepted destroyed pistons and engines as part of experimental development. His general approach was to increase performance until something failed, learn from the failure, and then reduce the demands to a more sustainable level.

Carmack moved from the 328 to a Ferrari Testarossa for greater tuning potential. Its larger flat-12 engine and wider chassis offered more room for twin turbochargers, intercoolers, and other modifications.

The modified Testarossa eventually produced approximately 1,009 horsepower at the rear wheels. Carmack emphasized that this was measured wheel horsepower, not an optimistic engine-output estimate. The standard car produced roughly 380 horsepower by his recollection.

The Testarossa's greatest advantage was extraordinary acceleration at speed. Its gearbox and traction limitations prevented ideal standing starts, but Carmack said it could accelerate from around 50 to 150 mph with astonishing force.

The high-powered Testarossa could outrun superbikes under suitable rolling-acceleration conditions. Carmack described its performance as exceptional once the engine was producing full turbocharged power.

Controlling the Testarossa required careful modifications and driving. Larger tires, stiffer suspension, and eventually traction-control adjustments helped manage the power, which could otherwise push the car sideways as boost arrived.

Carmack effectively used the access road near id Software as a personal acceleration strip. The Ferrari's extremely loud arrival became familiar enough that employees could recognize when he was approaching the office.

The Testarossa was eventually reduced to approximately 600–700 horsepower and sold. Carmack warned that the highly modified car could suffer additional mechanical failures, and he later understood that the buyer experienced further problems.

Carmack's Ferrari 328 became a prized historical object after Thresh won it. The winner reportedly displayed it at his company and eventually sold it. Carmack later heard that the car was still operating.

The modified 328 presented emissions and maintenance difficulties. Its turbocharged configuration was not always road-legal under applicable emissions requirements, and its unusual electronic management system could be difficult to repair.

Carmack also owned a Ferrari F40 but modified it comparatively little. He mainly altered its turbocharger wastegate behavior to obtain performance closer to racing specifications.

The Ferrari F40 required aggressive driving to deliver its performance. Carmack explained that its small turbocharged engine felt weak at low engine speeds and needed substantial revs and boost to become exciting.

The F40 reflected a race-car approach to road-car design. It included unconventional details such as simple interior door-release cords, which once confused a valet who could not figure out how to open the door.

Carmack came to prefer Tesla vehicles over his exotic Ferraris. At the time of the conversation, he owned a Tesla Model S P100D and called it the best car he had ever owned.

Carmack valued Tesla's ability to deliver extraordinary acceleration without the complications of modified supercars. The electric drivetrain, traction control, quiet operation, and instant response made high performance practical in ordinary situations.

Carmack had previously owned an early Tesla Roadster. He recalled someone describing its acceleration as driving a railgun, an analogy he considered appropriate for the smooth electromagnetic propulsion.

Tesla's launch acceleration impressed Carmack more than that of his old Ferraris. He nevertheless acknowledged that his thousand-horsepower Testarossa delivered a more sustained and violent sensation during high-speed acceleration.

Carmack had reserved the next-generation Tesla Roadster. He was particularly interested in the proposed SpaceX rocket-thruster package involving high-pressure compressed-gas tanks.

Carmack explained that very powerful electric cars become limited by tire traction rather than available horsepower. Adding more motor power cannot improve initial acceleration indefinitely when the tires cannot transmit additional force to the road.

Compressed-gas thrusters could theoretically overcome some traction limitations. By expelling high-pressure gas through a nozzle, a vehicle could generate additional thrust without relying entirely on its wheels.

SpaceX's lightweight high-pressure tank technology made the proposed Roadster system interesting. Carmack discussed compressed air stored at pressures on the order of 10,000 psi as a possible source of short bursts of substantial thrust.

Angling thrusters could improve acceleration by creating downforce. Carmack reasoned that pushing the vehicle downward as well as forward might allow its tires to transfer more electric-motor torque to the road.

Carmack speculated that additional controlled thrusters could let cars briefly jump. Strategically positioned nozzles might generate enough force for a short leap and controlled descent, although this was his engineering speculation rather than a confirmed Tesla feature.

Carmack considered sustained flight impractical with ordinary compressed-gas systems. Limited propellant capacity would make brief impulses or hops more realistic than a conventional flying car.

Carmack's automotive thruster ideas drew on his experience developing reusable rockets. His company had built computer-controlled vehicles capable of lifting off, hovering, translating sideways, and landing.

Early rocket belts offered extremely short flight times. Carmack described hydrogen-peroxide-powered backpacks that might provide only approximately 20 seconds of usable flight despite carrying substantial quantities of propellant.

Rocket-powered personal flight is inherently unstable without control assistance. Unlike helicopters, rockets lack comparable passive stabilization, making small errors capable of causing rapid loss of control.

Early rocket-belt operators frequently suffered injuries. Carmack said their flights demanded exceptional skill, and accidents could involve broken legs or other serious consequences.

Jet-powered flight systems can operate longer because they use atmospheric oxygen. Unlike rockets that carry their own oxidizer, jet engines take oxygen from surrounding air and generally need to carry only fuel, allowing several minutes of flight.

Carmack believed computerized stabilization could make personal jet propulsion substantially safer. He pointed to advances in drone flight control as evidence that machines can manage complex movement more accurately than unaided human operators.

Armadillo Aerospace developed controlled hovering rockets for competition and research. Carmack recalled demonstrating a roughly 2,000-pound vehicle that rose, moved sideways, and landed at an Oklahoma airfield.

Carmack worked on guidance and control software for Armadillo's rocket vehicles. The project required him to learn control theory, embedded programming, and other disciplines beyond his usual game-engine work.

Armadillo repeatedly destroyed expensive vehicles while developing its technology. For approximately eight or nine years, Carmack said the company built and lost around two rocket vehicles annually.

Later Armadillo vehicles could cost more than $100,000 each. Carmack accepted that prototypes might end as wreckage because failures generated information necessary for improving future designs.

Cheap drones demonstrated the advantage of inexpensive experimentation. Carmack contrasted costly rocket failures with university drone teams that could crash numerous inexpensive aircraft, replace them quickly, and accelerate their learning.

Reducing the cost and time of each experiment can produce faster innovation than perfecting individual prototypes. Carmack regarded this as one of the major lessons from comparing rocket development with rapidly advancing drone technology.

Carmack's wife established financial boundaries around his rocket experiments. She allowed him to pursue his ambitions with a defined amount of money while protecting their family's finances.

Armadillo Aerospace performed work for NASA, the Air Force, and the Rocket Racing League. The company also developed manned rocket-powered aircraft and, according to Carmack, achieved an operating profit in one year.

Carmack believed small aerospace companies risk becoming dependent on government contracts. Contractors can survive by completing modest research assignments without making meaningful progress toward their original goal of building revolutionary vehicles.

Government funding can keep small aerospace companies alive without allowing them to grow decisively. Carmack described an ecosystem in which research contracts support engineers and experiments while potentially distracting companies from more ambitious commercial objectives.

Carmack deliberately chose a final ambitious push rather than continued contract-funded survival. He committed additional money with a goal of developing reusable suborbital vehicles capable of reaching the internationally recognized 100-kilometer boundary of space.

Armadillo reached approximately 92 kilometers but fell short of its 100-kilometer goal. Carmack recalled obtaining dramatic footage near space, including a black sky and the sun, but considered the achievement insufficient to justify continuing in the same manner.

Carmack eventually sold most Armadillo Aerospace assets to members of the team. Those individuals secured additional funding and attempted to continue developing the technology.

Armadillo taught Carmack that splitting his attention between major projects could undermine both ambition and execution. He had been spending roughly 40 hours weekly on id Software and another 20 on Armadillo, which he concluded was inadequate for leading a serious aerospace venture.

Carmack would approach another rocket company as a full-time commitment. He concluded that divided attention was especially damaging in fields demanding rapid technical learning and many consequential decisions.

Carmack admired SpaceX's progress and regarded its accomplishments as historically important. He emphasized that privately developed reusable rockets were delivering achievements long associated with science fiction and national space programs.

Elon Musk invited Carmack to participate in a SpaceX engineering meeting. Carmack attended and contributed technical suggestions, giving him direct exposure to the company's engineering work.

Carmack believed he could work at SpaceX but preferred pursuing something distinct. He did not want merely to become another senior engineer; he was more interested in developing an unconventional alternative if a worthwhile opportunity appeared.

Carmack retained ideas for cheaper, riskier rocket systems. He mentioned experimental monopropellant concepts that might reduce costs substantially but would introduce significant technical and safety challenges.

Rocket Lab's success reinforced Carmack's optimism about private spaceflight. He noted that companies smaller than SpaceX were achieving orbital launches, something historically dominated by a handful of national governments.

Carmack's rocket projects began around the same period as SpaceX and Blue Origin. He recalled Musk and an early SpaceX colleague visiting Armadillo in Dallas to discuss rocket technology.

Carmack viewed Blue Origin's original development philosophy as excessively cautious. He associated its slow, methodical approach with its tortoise symbolism and believed it postponed progress unnecessarily.

Carmack considered SpaceX's willingness to risk failure a competitive advantage. The company conducted ambitious experiments, sometimes lost vehicles, and learned quickly rather than avoiding potentially embarrassing failures.

Musk placed a substantial share of his fortune at risk during SpaceX's early years. Carmack recalled the company approaching a critical point after three unsuccessful launches, with another failure potentially threatening its survival.

Carmack believed unlimited financial backing can create weak incentives for urgency. He contrasted SpaceX's high-pressure environment with Blue Origin's ability to take much longer because of Jeff Bezos's personal wealth.

Blue Origin later became more serious about building large orbital systems. Carmack acknowledged that the company had advanced beyond its original slower pace and was developing substantial launch capabilities.

Suborbital tourism promised several minutes of weightlessness. Carmack contrasted a journey reaching approximately 100 kilometers with parabolic aircraft experiences offering roughly 20 seconds of weightlessness per maneuver.

Early space-tourism entrepreneurs considered approximately $100,000 a plausible ticket price. Carmack recalled this figure emerging from small companies attempting to determine whether commercial suborbital flight could support a viable business.

Virgin Galactic demonstrated that wealthy customers might pay substantially more. Carmack said Richard Branson's company announced prices around $200,000 and still attracted buyers.

Carmack considered Virgin's pricing an important business lesson. Smaller technical companies had underestimated what the market might bear, potentially sacrificing margins necessary to sustain an expensive operation.

Long development delays threatened the economics of space tourism. Carmack doubted that companies accumulating years of additional investment could recover those costs through ticket sales alone.

Carmack reconsidered his famous philosophy that games should ship only when finished. He had once valued the independence represented by refusing publisher deadlines, but later concluded that unlimited delays could seriously damage a project's prospects.

Short delays and multi-year delays have fundamentally different consequences. Carmack believed postponing a product by a few months can improve quality, while delaying for years may allow markets, competitors, and technology to change around it.

Carmack considered Rage an example of excessive development ambition. The game took approximately six years to complete, and he believed it should have shipped roughly two years earlier.

Rage's technology decisions became less appropriate as development continued. Choices made for earlier hardware generations were less suitable for the systems available when the game finally launched.

Rage also faced a substantially different competitive market by release. Carmack pointed to the growing dominance of Call of Duty and Battlefield as an example of competitors changing the environment during a prolonged project.

Carmack believed reducing Rage's technical ambition could have produced a better commercial outcome. He preferred, in retrospect, releasing a narrower product earlier rather than spending additional years pursuing ambitious engineering improvements.

Quake's development also suffered from trying to accomplish too much simultaneously. The project combined advanced 3D rendering, new gameplay technology, modding, multiplayer infrastructure, and other innovations within approximately two years.

Carmack retrospectively questioned whether Quake should have been divided into separate development steps. He suggested that id Software might have released an enhanced Doom-style game using some of the new technology and saved the remaining advances for a later title.

Carmack regarded Doom as exceptionally well timed. In contrast with the difficulties surrounding Quake and Rage, he believed Doom delivered the right technological advances at the right moment.

Blue Origin's strategic priorities appeared to be shifting toward larger government opportunities. Carmack believed the availability of major NASA contracts encouraged the company to pursue full-scale systems more aggressively rather than concentrating exclusively on tourism.

Carmack saw competition between SpaceX and Blue Origin as useful but believed speed mattered. His criticisms focused less on engineering talent than on organizational incentives and how quickly ambitious hardware could be tested and delivered.

Carmack's interest in space exploration goes beyond satellites and commercial launch services. He wants humanity to establish lasting settlements beyond Earth, including on the Moon, Mars, and potentially artificial space habitats.

Carmack believes becoming a spacefaring civilization would expand humanity's sense of possibility. He contrasted earlier eras of unexplored geographical frontiers with a modern world that satellites and GPS have made increasingly mapped and measurable.

Carmack rejected the view that humanity must necessarily accept permanently limited ambitions. He believed Earth still possesses enormous underappreciated resources and that space development could expand the possibilities further.

Permanent settlements beyond Earth would also provide protection against planetary disasters. Carmack mentioned threats such as major asteroid impacts, though he treated the emotional and civilizational value of expansion as important in its own right.

Carmack wants ordinary people to regard the Moon as a place where humans live and work. His ideal future includes lunar settlements that people can see as real destinations rather than distant scientific fantasies.

Carmack drew inspiration from mid-twentieth-century science fiction. He admired optimistic visions associated with writers such as Robert Heinlein, where engineering, technological progress, and space exploration expand human freedom.

Carmack recognized a tension between his work in VR and his enthusiasm for physical space exploration. Virtual reality creates artificial worlds within existing rooms, while spaceflight opens genuinely new physical environments. He nevertheless considered both legitimate ways technology could improve human lives.

Privately funded space programs make Carmack more optimistic about humanity's future. He valued the fact that ambitious entrepreneurs could pursue major exploration projects without depending entirely on government political decisions.

Carmack summarized his long-term VR ambition as making the world available in the form people want. He argued that physical reality cannot provide every person with the same access to beautiful homes, extraordinary destinations, and other desirable experiences.

VR could distribute some experiences that are otherwise restricted by wealth and geography. Carmack used private islands, mansions, and dedicated home theaters as examples of things that cannot physically be provided to everyone but can be simulated.

The people who benefit most from VR may not be those who can already afford exceptional real-world experiences. Carmack argued that wealthy individuals have less need for virtual equivalents, while people with limited resources could gain substantially.

Carmack expected standalone VR prices to fall significantly over time. He contrasted the approximately $400 Quest with the cheaper $200 Oculus Go and anticipated that improvements in manufacturing and price-performance would eventually broaden access.

Affordable smartphones demonstrated how advanced computing can reach lower-income markets. Carmack cited inexpensive smartphones in India, including devices costing around $25, as evidence that sophisticated technology can eventually become remarkably accessible.

Carmack defended VR against the accusation that it encourages people to abandon reality. He argued that if someone's physical circumstances are unpleasant or restrictive, an artificial environment that improves their experience should not automatically be considered harmful.

Carmack compared VR with air conditioning as another technology that changes human experience. People routinely modify uncomfortable physical environments to make life better, and he considered immersive simulation another possible extension of that principle.

Carmack acknowledged that virtual experiences cannot fully replace physical reality. He emphasized that existing VR does not reproduce everything people can touch, taste, or physically experience.

Many valuable activities primarily involve vision and sound rather than physical contact. Carmack cited watching entertainment, exploring museums, appreciating environments, and interacting with distant people as experiences that could increasingly occur through VR.

VR could make geographical separation less important in ordinary relationships. Carmack described the possibility of meeting a distant family member in a shared virtual room, seeing each other, and watching television together.

Virtual museums and similar environments could eliminate travel, queues, and crowds. Carmack envisioned people experiencing impressive collections and spaces privately, without the physical constraints normally associated with visiting them.

VR's greatest economic advantage could be delivering experiences without reproducing their physical cost. Carmack believed simulated environments could provide meaningful value to large numbers of people using far fewer resources than constructing equivalent physical facilities.

Carmack did not claim that contemporary VR was already suitable for everyone. He acknowledged major limitations in comfort, display quality, software, and the length of time people could tolerate wearing headsets.

Carmack remained optimistic that VR could evolve into an all-day technology. He imagined people eventually working inside virtual environments for hours and continuing to use them for entertainment and social interaction afterward.

Carmack evaluated technology primarily by the value it delivers to people. He repeatedly emphasized that impressive engineering is not enough by itself: the purpose of building better devices and software is to make useful experiences more accessible and improve what people can do with their lives.