Warping Rendered Scene?

[rwgray]

I have a custom Head Mounted Display (HMD). (Stereo = one micro display for each eye.) I need to warp the rendered (stereo) scene to compensate for the optical distortions of the HMD so I can view the scene without distortion.

What is the best way to do this?
Is there some texture mapping I can use, or do I have to write my own rendering functions? Anything in the software that allows for specifying compensation of distortion in the HMD by warping the rendered scene prior to sending to HMD?

Cheers,
Bob Gray