I'm developing a game, and I use user clip planes to render water reflections. Normally the code runs fine, but randomly it fails to work (no clipping at all). The calls to SetClipPlane and SetRenderState(D3DRS_CLIPPLANEENABLE, D3DCLIPPLANE0) succeed, GetClipPlane and GetRenderState report that the clip plane is active and has the correct values... but it just doesn't clip anything. This happens to me and 2 other users (all 3 with an AMD graphics card) - is there an issue with how it's implemented in the AMD driver? Is there a hack that I have to use to make it work (I have already tried this, to no avail)?
I'm not sure if it's relevant, but SetClipPlane doesn't seem to work with the reference rasterizer. Ever. And yes, I am aware that I can achieve the same result with texkill/clip in the Pixel Shader, but the thread is not about that.