Hi, thanks for your answer. Now the program runs and starts, but i only can see the mouse pointer and a black screen behind. This is the output of the console: Code: fixme:d3d_shader:shader_glsl_select >>>>>>>>>>>>>>>>> GL_INVALID_OPERATION (0x502) from glUseProgramObjectARB @ glsl_shader.c / 3315 fixme:d3d_shader:shader_glsl_load_constants >>>>>>>>>>>>>>>>> GL_INVALID_OPERATION (0x502) from glUniform4fvARB @ glsl_shader.c / 410 fixme:d3d_shader:shader_glsl_select >>>>>>>>>>>>>>>>> GL_INVALID_OPERATION (0x502) from glUseProgramObjectARB @ glsl_shader.c / 3315 fixme:d3d_shader:shader_glsl_load_constants >>>>>>>>>>>>>>>>> GL_INVALID_OPERATION (0x502) from glUniform4fvARB @ glsl_shader.c / 410 Regards,
