William F Pokorny <ano### [at] anonymousorg> wrote:

> The images use an 'interior_texture{}' that is green for the "What the
> heck" string. Only matters with the negative thickness on the third and
> fourth sub images. The fourth also using 'inverse'.

This is all pretty interesting - especially using "inverse"  I always forget to
try and use that in things.

I do notice that there is something - a shadow? - present in the two rightmost
images that are not present in the two leftmost.  Significant in any way?

- BW

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