ok lets say you have a P4 1.5 GHz, but you have an older openGL enabled video card. and you want to render 50,000 polys per frame, with lighting, shadows, etc, etc. and lets say this is too much for the card to handle. will the P4 pick up the slack of the video card? or will openGL use only hardware? or will it use only software rendering? or will it depend on which is faster?