Inspired by old-school demo-scene effects, here is a new and improved grayscale bump map render, which takes 8 bit height map input and generates real-time shading effects.
Please see GitHub for Python image conversion script and sample files. (https://github.com/electricgryphon/pico-9-height-map-converter)
I found the skull height map in the following forum:
http://www.cnczone.com/forums/artcam-pro/156994-last-supper-bas-relief-trade.html
--Electric Gryphon
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