Motion sickness is awful… Had it once at one of my first trys with vr, was in the spitfire in warthunder… Note to self, pvp aircombat with fast and intense maneuvres is not a good way to start out vr flying… Took some advice and has been flying happily in vr since.
- use a decent quality headset.
- make sure the system used can deliver smooth frames, studdering is a real vomit comet.
- make sure you are seated and in a temperate to cool room.
- start out with very gentle stuff to get they brain comfy with vr. Not fast and twitchy stuff.
- do short sessions of 15-30 mins max.
- if you feel you are getting warm or other bad signs, stop and walk away for at least a few hours.
The brain will normally associate the visual disconnect from the lack of real movement and g forces with the body being poisoned, hence putting you in a state that would encourage vomiting to releave you of the poisonous food you ate (primal stuff) however with a slow transition and adaption to vr this can in most cases be avoided.
But then again everyone is different, hope it will work out for you though.
Happy flying.