Hi again, I've been doing some research and I wanted to ask you guys. What is best method of rendering to a high perscision texture in OpenGL. I have an nVidia 6800 so I want to render to an float 32 render target. I actually only need to store 2 32bit float numbers so using Luminance and Alpha or Red and Green would be good. I'm looking at pbuffers and FBOs. It seems FBOs are the fastest am I correct. Also is there any good documents or links out there for doing this kind of thing? I've found very little in terms of how to render to texture.

Use FBO's... A good place to start is with the extension site.

http://oss.sgi.com/projects/ogl-sample/registry/EXT/framebuffer_object.txt

Here's a very good site about render-to-texture, FBOs, floating point textures etc:
http://www.mathematik.uni-dortmund.de/~goeddeke/gpgpu/tutorial.html