And so the plot thickens...thanks for the help, from the sounds of it there's something wrong with the texture input to the shaders, since the red shader has nothing to do with the motion blur area. You say that alt tabbing out then in caused the scene to reappear tinted? So in theory if you turn on motion blur at that point it *should* work (if you try this and its hard to tell, put the motion blur amount to something crazy "pp_motion_blur_amount").