Problems with OpenGL or with your graphics card or driver are unrelated to Gamestudio, so I'm moving this to Morbius. Gamestudio does not use OpenGL. - If it's a certain 3D card that causes problems, you can most likely find suggestions on the Internet. Another possibility is a hardware problem - overheating of the 3D card, a too weak power supply, or a memory fault. There are hardware tester programs that can find such kind of problems.