I haven't actually looked at the code to try to find the Win32 call. I have the Mono IDE, so perhaps it can tell me something about that. Also, I switched drivers between the first screenshot and the second, which is why this second one doesn't have the lines above all the sprites and tiles. The proprietary driver may be causing this strange new problem that the community driver did not cause, though it had other problems. (I never actually got to this part of the level with the other driver though, so I can't be sure). I do know that it supports GL_ARB_texture though. At least SGDK2 doesn't complain about it.