No I didn't changed any kind of setting. When I enabled shadows, the game did look the same. It might be a new thing since I changed my "headers" .deb packet in my linux distribution. So it can be an Intel's driver problem, or be related to my brand new kernel... Now I use Linux 3.2.0 and glxinfo|grep OpenGL give me : OpenGL vendor string: Tungsten Graphics, Inc OpenGL renderer string: Mesa DRI IntelĀ® Sandybridge Mobile OpenGL version string: 3.0 Mesa 8.0.2 OpenGL shading language version string: 1.30 Sorry for not having more information.