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@Anonymous wrote:

thanks the solution is working but it totally freezes the PC even on a small surface. Is thee any way to simply the computational time? 

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AutoCAD isn't that great at complex surfaces.  You might be better off with Fusion 360 or a full-blown surface sculpting program for most, if not all, of such a process.

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If you are going to fly by the seat of your pants, expect friction burns.
"I don't know" is the beginning of knowledge, not the end.