Proper way to render for Oculus Rift

[Kajos]

I know this is a little bit early, but I already wanted to set up a little game/engine, and maybe, just maybe try it out at Gamescom, if that's possible (I have no idea, and it's quite a blunt plan ).
Anyway, I would like to know how to render properly for the Oculus Rift.

I have confusion about this and was wondering if someone knows the answer:
- Would rendering at 90 degree FOV be enough? If not, what is the difference (in laymens terms)
- Or do I need to warp with a frament shader/vertex shader as well? Will warping with a fragment shader cause loss in quality (that's what I would presume)?

Major thanks.

[brantlew]

This is an easy one to answer. Here's an open source implementation..

http://www.mtbs3d.com/phpBB/viewtopic.php?f=138&t=15086

[Kajos]

Thanks! Gonna look into it

[Kajos]

Okay, so I looked at the sample you gave, which is quite nice. I have still have a question though: do I need to adjust the barrel warping? As I render with a 90 degree fov and I take it the barrel warp was designed for lesser fov. Is this the case?