   viewports and fullscreen
  I am a little confused as I go to work on render order and a render queue, after reading this article:http://realtimecollisiondetection.net/blog/He describes a flag to sort render order by. That flag has a field for fullscreen layer and another field for viewport layer.I have never rendered to a seperate viewport, but it makes sense that it could happen. However, you wouldn't render to fullscreen and a viewport at the same time right??? Isn't fullscreen a type of viewport in itself? Shouldn't these fields be combined? I am wondering about what happens when you have say 4 viewports, for a multipayer split screen or something. Then you want to render fullscreen on top, say for a "Game Over" screen. The fullscreen viewport is rendered last right? In DirectX you'd have an actual seperate viewport structure for each right?I can also think of another scenario where one might want to render fullscren behind viewports. Say a viewport is some sort of UI element like a map..Egad, this gets complicated.I suppose I am going to provide a means to overide the sorting method, I just need a consistant and logical flag to use.   