I know that with sgi you can put the framebuffer directly to a texture using the pbuffer. This alows you to bypass the slow copy pixel that travels across the agp bus into processor memory and then back to a texture.
Has anyone read of a way to do this with opengl, opengl extensions, or an nvidia extension?
The reason I want to map the framebuffer to a texture is to so I can do reflextions (or shadows) by rendering an object from a different viewpoint and then mapping that to a texture. Having to go out to processor memory will just kill performance. Any help would be great. Thank!!!