Motion sickness greatly reduces Retention metrics, because if the user is not happy with the experience, they won't come back, here are a number of practical tips: 1. Do not allow FPS sagging, any slips and delays are negatively read by the eyes and put the brain in a stupor 2. Manage the level of motion sickness, your mechanics should not launch the user's vestibular system into space 3. Make a smooth entry and gradually increase the revolutions so that the user can get used to the load

To combat VR motion sickness and accommodate varying user tolerances. Provide teleportation as an alternative to smooth locomotion and use visual anchors. Ensure high frame rates and low latency. Gradually introduce users to VR, starting with shorter sessions and including frequent rest points. Use visual and auditory cues to prepare for movement and avoid sudden accelerations. Implement "VR legs" training programs and provide clear warnings about potential triggers. This approach creates an inclusive VR environment that minimises motion sickness issues across different tolerance levels.

A major cause of motion or VR sickness is if the brain perceives conflicting signals from the balance nerve - the vestibular organ, our bodily contact with surfaces and impressions from the optic nerve. As a developer, in addition to ensuring high frame rates at all times in your app, implementing a comfortable navigation design scheme such as teleportation is one of the most effective ways to combat VR sickness. Also, no movement in VR should take place unless it’s user-driven. A proper world design with real-world perceptual cues are useful in helping users orientate and navigate their environment comfortably. Ensure the space is bright enough, that surfaces are properly textured and that enough objects are there to convey parallax.