You should really talk to Humus. He seems to be pretty helpful, and if it is a driver bug he could help to get it fixed since he's an employee(he was hired because of his 3d graphics demos).
Hacktarux said:It was a real pain in the ass but now fog works on ATI cards. It looks like i couldn't use the fogcoord extension with glsl on these cards so i had to use some really dirty tricks. Thanks to olivieryuyu for hours of testing to help me figuring out how to do this.
Use Laughy cheatotomo said:How can I get rid of the shadow on pilotwings` copter levels?
also, the system got very slow after running that game, which is not importat if I can play without the damn shadow .