[STL -> CNC] technique or software?

Any software or techniques for generating CNC carving depth maps from a mesh or stl?

It’s not possible within Luban, correct?

You can use the STL directly either in Luban (not recommended) or in Fusion360. However, if you particularly need a depth heatmap you can use stl2png.

Online version:

Download version:

Edit: I do have a guide for doing 3d engraves with fusion360.

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