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A couple of weeks ago at work we discovered a neat trick in Nuke where you can take the RGB values from an image and mix them with the XYZ values from a position pass from renderman to create a point cloud of the front surface of a render. You can also use a P-reference pass to put a creature back into bind pose as a bunch of points. Which allows you to do neat things like 3d roto.

As a result we started thinking would there be a cool way to also display the backfacing surfaces and encode them into RGB and XYZ.