by AndersG » Tue Dec 31, 2013 2:29 pm
Some effects/shader programs apparently fail to run correctly, try reducing the quality slider in the in-game View->Rendering Options dialog to switch to simpler shader programs (and ultimately the fixed function pipeline).
This might not have anything to do with the actual performance potential of your card as different graphics card vendors have interpreted the OpenGL GLSL language differently - the shader program in question was probably written and tested on systems with Nvidia cards. You might have useful error/warning messages from the OpenGL driver in the console or in ~/.fgfs/fgfs.log that can help the shader program writer to improve portability.
/Anders
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