No mon, my cube had pigment {White}!

Consider the following two boxes:

// image filename: norms

box{-1,1 pigment {White}



//image filename: norms02



scale .25


In the first case, povray has no problem clueing into the fact that black
should be down and white is up.
If I want a more complex texture, however, say elevated coarse bricks and
flat, depressed glass, I am at a loss to find a way to code it.

What is needed:
1) a new pattern (that normal will accept) which is black or 0 everywhere:
(aside: hmm, perhaps I could trick pov with a function here?)., --OR--
2) povray to accept syntax something like "normal {down}".

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Download 'norms.jpg' (12 KB) Download 'norms02.jpg' (8 KB)

Preview of image 'norms.jpg'

Preview of image 'norms02.jpg'