20180126 - Less Wrong UNORM Box Filter

When going for the traditional LDR MSAA box filter look, wanting to preserve the perceptual 4 or 8 step gradient on edges, but wanting have correct color of linear blending...

Technique is easy,

Problem solved: horrid box filter look without the non-linear color artifacts. Just like standard perceptual MSAA box resolve, the output is not energy conserving.

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