Quote:Original post by S1CA

Quote:Original post by MrDoomMaster
Well first of all, I don't even know what the Debug Runtimes are, much less how to use them. I've always based error checking on return values, nothing more.
...
Yet, in the DirectX documentation, the only 'reason' listed for failure of DrawPrimitive() is D3DERR_INVALIDCALL, which is absolutely *NO* help at all.

If a Direct3D function returns an error or is the slightest bit unhappy about something, the debug runtime will tell you *why* its unhappy. Here's some information on how to enable the debug runtimes (they're invaluable!):

http://nexe.gamedev.net/directKnowledge/default.asp?p=Debugging

Quote:I suspect submitting a NULL texture pointer to IDirect3DDevice9::SetTexture() may be the source of the problem. Can anyone confirm this?

NULL is actually a valid value for IDirect3DDevice9::SetTexture(), it simply unsets the currently set texture for that texture stage and decrements its reference count (the SetTexture() call with a non-NULL texture pointer increments the reference count for that texture).