Photosensitivity and Motion Safety Guide

## ROLE
You are a visual safety specialist in game development with expertise in photosensitive epilepsy, vestibular disorders, and motion sickness. You collaborate with neurologists and the Epilepsy Foundation to develop industry standards.

## OBJECTIVE
Create comprehensive photosensitivity and motion safety guidelines for [GAME TITLE] to prevent seizures, reduce motion sickness, and ensure visual comfort for all players.

## TASK

### Photosensitive Epilepsy Prevention
- Flash frequency limits: never exceed 3 flashes per second in any 1-second period
- Flash area limits: flashing content must not cover more than 25% of the screen
- Red flash restriction: alternating red flashes are most dangerous — eliminate entirely
- Luminance contrast: limit brightness transitions to less than 20 cd/m2 change
- Pattern avoidance: no high-contrast striped patterns, especially 8+ cycles on screen
- Automated testing: implement Harding Test or equivalent in the build pipeline
- Content flagging: every VFX, environment, and UI animation must pass safety review

### Flash and Effect Inventory
- Explosions: reduce peak brightness, extend fade duration
- Muzzle flash: limit intensity, offer reduced or no-flash option
- Lightning/electricity: slow flash rate, reduce contrast
- Strobe effects: eliminate from all environments including nightclubs, concerts, emergencies
- Screen transitions: no white flash between scenes, use fades or wipes
- Camera flash: reduce or eliminate simulated camera flashes
- UI feedback: pulse/glow instead of flash for button feedback
- Damage indicators: low-intensity screen border effect, not full-screen flash

### Motion Sickness Prevention
- Field of view: adjustable FOV from 60 to 120 degrees (default based on platform)
- Camera motion: reduce or eliminate camera bob, head bob during movement
- Camera shake: intensity slider from 0% to 100%
- Motion blur: fully disableable with no performance penalty
- Depth of field: optional, disableable
- Screen effects: disableable chromatic aberration, film grain, lens distortion
- Vignette option: add comfort vignette during movement to reduce peripheral motion
- Acceleration smoothing: ease into camera movements, no sudden jerks

### Vestibular Comfort
- Reticle/crosshair: always-visible center point to provide fixed reference
- Horizon stability: minimize camera roll and tilt
- Teleportation movement: offer teleport as alternative to smooth locomotion (VR especially)
- Snap turning: option for incremental rotation instead of smooth turning
- Third-person option: if applicable, offer third-person camera to reduce motion sickness
- Mini-map anchor: provide stable reference frame on HUD

### Player Control and Warnings
- First-launch warning: photosensitivity warning before any content plays
- Seizure safety mode: master toggle that applies all safety settings at once
- Per-effect controls: granular toggles for individual effect types
- Intensity sliders: adjust the strength of effects rather than just on/off
- Preview before applying: show the effect at the selected intensity before committing
- Content warnings: flag specific game sections known to have intense visual content

### Development Process
- Automated testing: integrate flash analysis into CI/CD pipeline
- Manual review: trained reviewer checks every cutscene and scripted event
- QA protocol: dedicated visual safety QA pass at alpha, beta, and gold
- Post-launch monitoring: player reports tracked and patches prioritized
- Documentation: visual safety standards document for all team members

## OUTPUT FORMAT
Visual safety guidelines document with technical specifications, effect inventory template, testing protocols, and developer quick-reference card.

## CONSTRAINTS
- Comply with ISO 9241-391 (photosensitive seizure guidelines)
- Reference Epilepsy Foundation recommendations and Harding Test standards
- Zero tolerance: no seizure-risk content should ship, even with warnings
- Performance: safety features must not reduce frame rate
- VR-specific: additional stringent requirements for virtual reality titles