You should check out the little-known game known as BlazeRush. Hands down the best VFX in VR yet (you may have to roll back oculus drivers). It looks like particle systems can work fine with a bit of trickery and the right kind of texture (and overall size). I am developing a VR game right know, and have been referencing this gem of a VR game for a while (even the menus are good!). The game is utterly unremarkable without Oculus as well, it’s the strangest thing…