Forum Discussion
Calculating the Infinite Focal Plane ("skydome")
Forgive me if this has already been solved, but I spent quite a bit of time trying to hunt down information, and ended up running some tests of my own (sans my Rift Devkit as yet). While I'm sure they...
"Capyvara" wrote:
Theoretically, if you render the skydome at the same position for both eyes it will be perceived at infinity.
In Unity for example, you can make two domes, each one follow the position of one eye, use the culling masks to isolate the rendering.
Or do the perspective offset in the distortion shader and use stock unity sky box.
True, but "infinity" according to our brain, is at a fixed distance not all that far away. You don't, for example, see clouds or distant mountains or stars in stereoscopic 3D - they all appear at a monographic, equidistant point, because at some point the subtle variations in each eye's signal meet the resolution threshhold of the eye.
The same thing happens in rendering, but at an apparent closer distance because the resolution of the Rift causes the skydomes to converge at a nearer point then they appear to IRL.
I believe this is correct, but my methodology for calculating that "infinity" point could be wrong. If you can demonstrate my methodology is incorrect I'd be really interested, because there seems to be very little written on the topic!