Texture Mapping in OpenScad!

Recently on the OpenScad discussion alias, I was trying to explain how I could do my own lighting calculations if given half a chance. Altough it's not really a possibility for the current OpenScad renderer, I got to thinking. Even though I can't print in multiple colors (yet), I can certainly liven up my OpenScad renderings a bit.

This thing is a set of imaging routines for OpenScad.

The general principle is fairly straight forward. First you need an image to be converted to a format t