When display a 3D object, the Window always has a black region in the right and bottom direction.when I change the background color, the region color is not changed and black. every time I start a new window,the black region is changed and sometime small and sometime big. why?
When I display a 2D object in v2d_view, I change the background color , no problem.
I have a problem When I Display a 3D object.