Test render from a macro that parses an image file. It divides the image
into whatever dimensions the user specifies (w*h), then samples each point
in the image. I had it make a cube of the same color as the test points for
this image. You can't really decipher what the first one is without
standing back a bit, kind of like the Dali image with the Abe Lincoln bust
in it. I wrote a couple more... will post examples if I get time later.
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