Yeah, I used the deferred lighting sample scene to get it set up in my own scene. I just tried running the sample scene as well, but it has the same issue with blurring, and there is a border of discolored pixels rendered around the edge of the screen, but it is not as visible because of the higher resolution i think? In my own project, I am use a 640x360 virtual screen size, and letting it be scaled up by the pixel perfect screen resolution.