depth of field with hexagonal kernel - by musk

That Pipeline:

            --> p1 --> p2 --
          /                  \
--> p0 --+----> p3 --> p4 ----+--> p7 -->
          \                  /
            --> p5 --> p6 --


1) Compute the circle of confusion:

	color & depth -> p0_comp_blur_amount.hlsl


2) Separable blur 3 times:

	p0 -> p1 -> p2
	p0 -> p3 -> p4
	p0 -> p5 -> p6


3) Combine them to form a hexagonal kernel

	p2 & p4 & p6 -> p7_combine.hlsl




