For you a tricky question : do you know a way to apply negative and positive offsets on different surfaces based on its colors in Blender ?
For this key, the green represents the surfaces without offset. The blue represents the down-facing surfaces where I expect a lack of material, so I would like to do a positive offset on the geometry. Finally, the red represents the up-facing surfaces where I expect a surplus of material, so I would like to do a negative offset on the geometry.
The goal is to 3D print this key and prevent the surplus or lack of material during the print.
Tell me if you have any ideas,