Explanation
The number of images displayed each second, critical for a smooth experience (90+ FPS in VR).
Real-world example
A movie at 24 FPS versus a VR application at 90 FPS to prevent motion sickness.
Practical applications
- Visual fluidity: ensuring that movements appear natural and not choppy
- Motion sickness prevention: an insufficient framerate is a leading cause of nausea in VR
- Interaction responsiveness: every action must be displayed instantly
- Immersion credibility: the brain immediately detects visual irregularities
Key VR framerate thresholds
< 72 FPS: insufficient
- High risk of motion sickness
- Choppy, uncomfortable experience
- Must be avoided for extended sessions
Example: A poorly optimized VR game running at 45 FPS — nausea guaranteed
72–90 FPS: minimum standard
- Comfort threshold for most users
- Standard for current headsets (Quest: 72–90 Hz)
- Sufficient for short to medium sessions
Example: Most Quest applications run at 72 or 90 FPS
> 90 FPS: optimal
- Maximum fluidity, extended comfort
- Required for sensitive users
- High-end headsets: 120 Hz, 144 Hz
Example: Quest 3 in 120 Hz mode for fast-paced games
VR scenario
In a VR flight simulator, a stable framerate of 90 FPS allows the pilot to turn their head rapidly to check instruments without the image "stuttering." At 45 FPS, the trainee pilot feels discomfort that compromises learning.
Why it matters in professional VR
- Framerate is NON-NEGOTIABLE in professional VR — below 72 FPS, the experience becomes counterproductive
- Direct impact on user health (nausea, headaches) and therefore on VR acceptance
- A key criterion for both hardware selection and VR content optimization