Hi, I have a 3d viewer on windows which supported opengl software rendering as a fallback. As the windows software renderer only support OpenGL 1.1, I decided to give Mesa a try. Cosscompiling libgl-gdi to create the needed opengl32.dll was quite easy and after copying the dll to the application folder the viewer started without any problems and displayed my test scene. The only issue was, that the performance of the viewer was very poor in comparison to the opengl software renderer of windows. Just to give you some numbers: Windows GDI: 40 fps Mesa: 0.9 fps I used vtune to profile the viewer which reports that nearly all the time is spend in glGetColorTableParameterivEXT. Do you have any clue, if I'm doing anything wrong? I'm wondering about the use of colortables and I'm very sure, that I'm not calling this function from my sourcecode. Any hint would be appreciated. thanks Christian