Here's a tool some might find very useful.
From www.scorchworks.com who also more than dabbles in home Injection Plastic Molding (way cool !)
Here's what he did with G-code Ripper "auto probe" to map a lithophane unto the odd shape of a pumpkin (of all things) :
The workflow used can be found here : CNC Lithophane Jack-O-Lantern | Scorch Works Blog
Have fun ...
G-code Ripper : scales, rotates, splits and wraps G-code 2016-03-30
Transform a G-code job without returning to the CAD file. Now with "auto probe" for uneven surfaces
