Ok, I just figured out that when I save the rendered view in a bmap like that:
camera_scene = bmap_createblack(screen_size.x, screen_size.y, 24);
camera.bmap = camera_scene;
And then use "camera_scene_bmap" within the shader instead of "TargetMap" everything works fine.
But shouldn't be TargetMap set automatically?
I only add this single stage to the camera. I really can't figure out what's wrong here.
Any ideas?
Sascha.