• Use Oculus VR distortion shaders.
• Always allow head motion control. In menus, cut scenes, everywhere.
• Images presented to each eye should only differ only in terms of viewport.
• Your program should run at a frame rate greater than the Rift display refresh rate, v-synced and unbuffered.
• Keep game loop latency consistent.
• Avoid rotating the horizon line of the user's environment which would conflict with the user's real-world self-motion.
• Avoid disabling positional tracking.
• Users can move their viewport position slightly, mind the surface culling.
• Warn the user when they are close to moving out of positional tracking area.
• Real world movements speeds feel most comfortable, between 1.4 m/s and 3 m/s.
• Give visual indication on teleportation.
• Avoid zoom effects.
• Avoid head bobbing.
• Allow settings to adjust the intensity of the visual experience on-the-fly.
• Oculus depth perception is sensitive up close but quickly diminishes. Increasing the distance between eye cameras can increase depth perception but might cause discomfort.
• Use lightning, textures and parallax to increase feeling of depth.
• UIs should be part of the virtual world and 2-3 meters away from the viewer.
• Allow viewing UI in the middle of the screen using your head movement, eye movement is straining.
• Draw all cursors and crosshairs at the same depth as the targeted object.
• Produce audio always in 3D world.
• In Unity, one unit is one meter.
• Most objects are comfortable to view between 0.75m and 3.5m.
• Prefer player having in-game avatar, but mind how the real-world and virtual world gestures contradict e.g. sitting or running.
• Minimize need of strafing, back-stepping and spinning.
• Keep in mind that player could watch in any direction in any given moment.
• Prefer "tank mode" where your avatar movement direction is not affected by where your avatar is looking.

Sources

• Oculus, Best Practices Guide