I think Voodoo 2's (which the monster3D has, doesn't it?) don't allow locks to video-memory textures.
If you use the D3D texture manager, you shouldn't have to worry about this.
With your own, have a mip-map chain in system memory, then use Load() to upload it to video-memory.
I tried turning on texture management and the problem seems to be fixed now on the 2 monster fusion cards I have access to. I wonder why the DX docs don't say anything about that, or maybe I'm just overlooking it.Anyway, thanks again for the help!
Thanks
It would be nice if the Voodoo's D3D driver would just allow locks to video memory surfaces, and emulate them by allowing the user to edit system-memory surfaces, allocated on demand, and then upload them to the video memory surface. Maybe that should be a feature request to 3dfx . . .
