I encountered some strange speed issues when using a pbuffer for rendering to a texture, for example I downloaded this demo from delphi3D http://www.delphi3d.net/download/arbrendertex.zipand got such results: copying a texture from a framebuffer 400FPS, copying a texture from a pbuffer 150FPS, using pbuffer as a texture 65FPS. I got similar results on a couple of PC?¢_~s. As I see it results should have been the other way around, any thoughts?