Platform: VR

90+ FPS, comfort-first design, and motion control accuracy define VR development.

Available Scripts

vr_physics_hand.gd

Expert physics-based hand controller with grab detection and velocity throwing.

NEVER Do in VR Development

• NEVER drop below 90 FPS — 72 FPS in VR = instant nausea. MUST maintain 90 FPS minimum (Quest 2/3), 120 FPS preferred. Use Debug → Profiler aggressively.
• NEVER use smooth rotation without vignetting — Smooth camera rotation = vestibular mismatch = motion sickness. Provide snap turning (30°/45°) OR vignette during rotation.
• NEVER place UI too close or too far — UI at 0.5m = eye strain, at 10m = unreadable. Optimal distance: 1-3m from player.
• NEVER ignore motion-to-photon latency — >20ms latency = visible lag in hand tracking = breaks immersion. Minimize physics steps + rendering delay.
• NEVER skip teleport locomotion option — Not everyone tolerates smooth locomotion. MUST offer teleport as alternative for accessibility.
• NEVER forget physical boundaries — Player punches wall IRL = lawsuit. Use XRServer.get_reference_frame() to respect guardian/chaperone bounds.
• NEVER use standard 3D audio — Stereo audio in VR = disorienting. Use spatial audio (AudioStreamPlayer3D) for positional sound cues.

# Enable XR
func _ready() -> void:
    var xr_interface := XRServer.find_interface("OpenXR")
    if xr_interface and xr_interface.initialize():
        get_viewport().use_xr = true

Comfort Settings

• Vignetting during movement
• Snap turning (30°/45° increments)
• Teleport locomotion option
• Seated mode support

Motion Controls

# XRController3D for hands
@onready var left_hand := $XROrigin3D/LeftController
@onready var right_hand := $XROrigin3D/RightController

func _process(delta: float) -> void:
    if left_hand.is_button_pressed("trigger"):
        grab_with_left()

Performance

• 90 FPS minimum – Critical for comfort
• Low latency – < 20ms motion-to-photon
• Foveated rendering if supported

Best Practices

1. Comfort First – Prevent motion sickness
2. High FPS – 90+ required
3. Physical Space – Respect boundaries
4. UI Distance – 1-3m from player

Reference

• Related: godot-camera-systems, godot-input-handling

Related

• Master Skill: godot-master