Hey everyone!

I found some mask files I want to use for some projects, my only problem is that they are 3d printing models with the texture on the outside. I am looking to carve these masks out of a block of plaster/silica material. The problem I'm having is all the texture is on the outside of the model, and I need that texture to be in the bottom of the cavity after I route the design.

I am not sure if I'm explaining this properly, but I essentially need a way to create a specific dimension block inside of autocad, and "extract" the mask from the block, leaving the design in the bottom of the block. I will then be filling this plaster/silica block with crushed glass in order to get all the texture of the mask on the outer facing side (once I remove the glass from the mold).

If anyone can help me, or explain to me how to accomplish this, I would appreciate it!

Best Wishes