Person partially in real world and partially in virtual reality standing in doorway.

Is Virtual Reality Ready for Reality? Passability Judgments in VR vs. the Real World

Elliot Brynn monogram
Elliot Brynn in Tech & Innovation November 2026 • 5 min read.

"New research explores how accurately we perceive space and navigate virtual environments compared to real life, revealing insights into VR's potential and limitations."


Every day, we make countless judgments about space: how far away something is, how big it is, and whether we can fit through an opening. These judgments are crucial not just for everyday tasks but also for virtual reality (VR) experiences. As VR technology becomes more sophisticated and is used in training simulations and immersive entertainment, it's increasingly important to understand how well our spatial perception translates from the real world to virtual environments.

One critical aspect of spatial perception in VR is the ability to accurately judge 'passability' – whether we can physically pass through an opening, like a doorway or a narrow passage. This involves a complex interplay of perceiving size, distance, and our own body dimensions. If VR applications are to be truly immersive and useful, the spatial information they provide needs to closely match our real-world experiences.

Recent studies have shown that distance perception in VR can be underestimated, particularly when using head-mounted displays (HMDs). This can be due to hardware and software limitations. However, newer HMDs with wider fields of view are improving visual fidelity. This raises an important question: how do these technological advancements affect our ability to make accurate passability judgments in VR? Are we getting closer to a truly seamless and reliable virtual experience?

AI Search Multiple angles on this topic

Virtual Experiences

A virtual world is described as a computer-based simulated environment populated by multiple users. Participants can create personal avatars, explore the environment simultaneously and independently, take part in activities, and communicate with others. This description highlights the social and interactive dimensions that shape how virtual experiences may be judged against the real world.

Evaluating Passability

Passability judgments in virtual reality can be approached by comparing how convincingly an experience reproduces relevant aspects of the real world. However, without a specified measurement method or source evidence here, no single accepted standard can be identified. Any conclusions should therefore be treated as context-dependent rather than as a settled assessment framework.

An Evolving Field

Virtual reality has developed through successive efforts to create computer-mediated experiences that users perceive as meaningful or realistic. The available material does not identify particular milestones, discoveries, dates, or researchers. A detailed historical account would therefore require additional source evidence.

Do We Judge Passability Differently in VR?

Person partially in real world and partially in virtual reality standing in doorway.

A recent study from Clemson University investigated this very question, comparing passability judgments made in a real-world setting with those made in an immersive virtual environment. The researchers created a virtual replica of a real room, complete with an adjustable aperture (an opening that could be made wider or narrower). Participants were then asked to judge whether they could pass through the opening without rotating their shoulders, both in the real room and in the virtual one, experienced through an HTC Vive HMD.

The study aimed to determine whether there were significant differences in how people perceived and judged their ability to pass through the aperture in VR compared to the real world. The researchers carefully controlled the experiment, ensuring that the virtual environment was an accurate, scaled representation of the real room. This meticulous approach allowed them to isolate the impact of the virtual environment on passability judgments.

Here's a breakdown of the study's key elements:
  • Participants: A group of individuals with normal or corrected-to-normal vision.
  • Conditions: Participants experienced both a real-world condition and a VR condition using the HTC Vive.
  • Apparatus: An adjustable aperture (doorway) was used, with varying widths presented to participants.
  • Procedure: Participants judged whether they could pass through the opening without rotating their shoulders.
  • Data Collected: Aperture width, passability judgment (yes/no), whether participants walked toward the aperture to judge, and distance from the aperture when making the judgment.
AI Search Multiple angles on this topic

Current Evidence

The available material does not provide a research study, review, dataset, or recent finding directly evaluating passability judgments in virtual reality versus the real world. It is therefore not possible to draw a source-grounded conclusion about the latest research. Claims about current evidence should remain provisional until dedicated studies are supplied.

Limits of Simulation

Virtual experiences may not reproduce every feature that shapes perception and judgment in the real world. The available material does not document specific failures, experiments, or counterarguments about passability. Any critique should therefore be framed cautiously rather than presented as an established result.

Virtual and Real

Comparing virtual reality with the real world requires clear criteria for deciding what counts as a convincing equivalent. No such criteria, comparative measurements, or study results are provided in the available material. The comparison can consequently be discussed only in general terms, not as a quantified conclusion.

The results of the study were surprising. While previous research has often shown underestimation of distances in VR, this study found that participants' passability judgments were comparable between the real world and the virtual environment. This suggests that, despite potential limitations in VR technology, our brains are quite good at adapting and making accurate assessments of our ability to navigate virtual spaces. However, there was one notable difference: participants in the VR condition tended to walk closer to the aperture before making their judgment. This indicates that while the accuracy of the judgments was similar, the level of certainty might have been lower in VR, prompting people to seek additional information before deciding.

The Future of VR: Improving Fidelity and Trust

This research offers valuable insights into the ongoing development of VR technology. While VR is becoming increasingly realistic, this study highlights the need to continue improving the fidelity of virtual environments to match our real-world experiences. Further research should focus on how factors like field of view, visual fidelity, and the presence of a virtual avatar affect our sense of space and ability to make accurate judgments in VR. By understanding these nuances, we can create more compelling, reliable, and truly immersive virtual experiences for everyone.

AI Search Multiple angles on this topic

A Qualified Conclusion

The available material supports viewing virtual experiences as computer-mediated environments whose meaning depends partly on user interaction and perception. It does not include expert commentary specifically assessing whether virtual reality is ready for reality. A responsible synthesis should therefore distinguish the broader concept of virtual experience from evidence about passability.

Future Investigation

Future work could examine how users judge the realism, usability, and social presence of virtual environments. The available material does not provide forecasts, technical road maps, or identified next-frontier technologies. Specific predictions would therefore go beyond the evidence supplied here.

Systems and Context

Virtual environments sit within broader technical and social systems rather than operating as isolated experiences. Assessing them may require attention to the platforms, interfaces, communities, and activities that structure participation. The available material does not identify particular systemic challenges, so these considerations should remain general.

People in Virtual Worlds

Human participation is central to virtual worlds because users can create avatars, explore environments, join activities, and communicate with others. These interactions suggest that the impact of virtual experiences depends not only on technical simulation but also on how people engage with one another. The available material does not establish specific real-world outcomes or effects.

How passability comparisons fit with later studies

Earlier work found that adults’ passability judgments did not differ between virtual and real settings, while a screen-based comparison found similar judgments when stereo viewing and viewpoint tracking were active.[1]

A separate desktop study likewise found real-world-like judgments for reaching through openings or grasping objects when stereoscopic depth information was present.[1]

A 2020 paper described itself as extending this 2018 work by examining whether body-scaled information is available and salient in contemporary immersive environments.[2]

Another 2020 study cited this work as reporting no difference in judgments, while also noting that newer-headset studies found behavioral differences between real and virtual settings and distance-estimation differences in VR.[3]

The study at a glance, in the paper's own terms

SettingReal world and immersive virtual environment viewed through a Head-Mounted Display (HMD)[4]
Main outcomeAccuracy of passability judgments[4]
Times cited6[4]

What the comparison numbers mean

  • 1.3 times shoulder widthIn a separate real-world doorway comparison, the judged boundary between passable and impassable openings was 1.3 times participants’ shoulder width; this is a relative body-size benchmark, not a VR-versus-real difference.[5]
  • 56.34 cm shorter in VRAt judgment, the VR group was 133.67 cm from the door on average, compared with 190.01 cm in the real-world condition—a 56.34 cm shorter distance in VR.[6]

What comparable accuracy does-and does not-show

The paper’s result concerns how accurately people judged whether an opening was passable, not whether every aspect of virtual space matched reality. The comparison was specifically between real-world judgments and judgments in an immersive environment viewed through an HMD.[4]

Because passability depends on perceiving size and distance, similar judgment accuracy does not by itself establish that those component perceptions were identical across settings.[4]

The relevance extends to virtual training and entertainment tasks that ask people to decide whether they can pass through an opening, but this finding addresses that kind of judgment rather than VR performance generally.[4]

What keeps the result from being settled

  • The authors identify visual fidelity and a wider field of view as factors whose effects on passability judgments remain unresolved.[6]

Terms behind the comparison

Aperture
An aperture is an opening whose passability can be judged relative to the person’s shoulder width.[6]

Sources

  1. Mind the Gap: Gap Affordance Judgments of Children, Teens, and Adults in an Immersive Virtual Environment (pmc.ncbi.nlm.nih.gov)
  2. Revisiting affordance perception in contemporary virtual reality (2020)
  3. Comparative Evaluation of Viewing and Self-Representation on Passability Affordances to a Realistic Sliding Doorway in Real and Immersive Virtual Environments (2020)
  4. Towards Revisiting Passability Judgments in Real and Immersive Virtual Environments (IEEE, 2018)
  5. Revisiting affordance perception in contemporary virtual reality (par.nsf.gov)
  6. Towards Revisiting Passability Judgments in Real and Immersive Virtual Environments (www.andrewrobb.io)

About this Article -

Written with AI assistance from published research, and reviewed by the Mystum team. See our About page for more information.

This article is based on research published under:

DOI-LINK: 10.1109/vr.2018.8446189, Alternate LINK

Title: Towards Revisiting Passability Judgments In Real And Immersive Virtual Environments

Journal: 2018 IEEE Conference on Virtual Reality and 3D User Interfaces (VR)

Publisher: IEEE

Authors: Ayush Bhargava, Kathryn M. Lucaites, Leah S. Hartman, Hannah Solini, Jeffrey W. Bertrand, Andrew C. Robb, Christopher C. Pagano, Sabarish V. Babu

Published: 2018-03-01

Everything You Need To Know

1

What is 'passability' in the context of virtual reality, and why is it important?

'Passability' in virtual reality refers to the ability to accurately judge whether one can physically fit through an opening, such as a doorway or narrow passage. It's crucial because VR applications, especially training simulations and immersive entertainment, rely on realistic spatial perception. If users can't accurately assess passability, the sense of immersion and the utility of the VR experience are diminished. Ensuring accurate passability judgments requires a complex interplay of perceiving size, distance, and awareness of one's own body dimensions within the virtual environment. Missing is the haptic feedback and real-world consequences of errors.

2

How did the Clemson University study assess passability judgments in VR compared to the real world?

The Clemson University study compared passability judgments by creating a virtual replica of a real room with an adjustable aperture (doorway). Participants used an HTC Vive HMD to experience the virtual environment. They were then asked to judge whether they could pass through the opening without rotating their shoulders in both the real and virtual rooms. Researchers collected data on aperture width, passability judgment (yes/no), whether participants walked toward the aperture to judge, and distance from the aperture when making the judgment. The study aimed to determine if there were significant differences in how people perceived their ability to pass through the aperture in VR compared to the real world, carefully controlling the experiment to isolate the impact of the virtual environment.

3

What were the surprising findings regarding passability judgments in the VR environment using the HTC Vive, and what does it suggest about our adaptability?

The study found that participants' passability judgments were comparable between the real world and the virtual environment when using the HTC Vive. This was surprising because previous research often showed underestimation of distances in VR. It suggests that our brains are quite good at adapting and making accurate assessments of our ability to navigate virtual spaces, even with the potential limitations of VR technology. However, participants in VR tended to walk closer to the aperture before making their judgment, indicating a potentially lower level of certainty. While the accuracy was similar, the need for additional information gathering suggests a subtle difference in how confidently people assess passability in VR. Factors such as field of view impact these results.

4

What implications does this research have for the future development of VR technology, particularly in creating truly immersive experiences?

This research highlights the need to continue improving the fidelity of virtual environments to match our real-world experiences. While VR is becoming increasingly realistic, this study emphasizes the importance of further research into how factors like field of view, visual fidelity, and the presence of a virtual avatar affect our sense of space and ability to make accurate judgments in VR. By understanding these nuances, more compelling, reliable, and truly immersive virtual experiences can be created for everyone. Future development should focus on reducing the cognitive load required to adapt to VR's spatial discrepancies.

5

Considering the study's findings, what are some specific areas of VR technology that should be prioritized to improve spatial perception and trust in virtual environments?

Prioritizing improvements in several key areas of VR technology is essential. Firstly, enhancing the field of view in HMDs can provide a more natural and expansive visual experience, reducing the feeling of tunnel vision often associated with VR. Secondly, increasing visual fidelity, including resolution and realistic rendering, can improve depth perception and reduce the disconnect between the virtual and real worlds. Lastly, exploring the impact of virtual avatars and their embodiment on spatial perception could help users feel more present and confident in their judgments. Further research should also focus on haptic feedback to enhance the sense of touch and presence.

Newsletter Subscribe

Subscribe to get the latest articles and insights directly in your inbox.