Has anyone had any problems with SetRenderState( D3DRS_CLIPPLANEENABLE, D3DCLIPPLANE0 )? It works fine on my ATI 9700pro, but doesn''t seem to have any affect on my GF4 4200. I have updated my NVIDIA drivers but didn''t make any difference. Is there something else that needs to explicitly enable custom clipping? I can''t find much out there on the net. Thanks in advance! (this is dx9 btw).

Yep! That was it! I never would have guessed that the GF4 series doesn''t support custom clip planes.

Thanks.