Draw a geometry by 3DEC

hello, everyone, what is the best way to draw this geometry by using 3DEC?

Well, if you have a dxf, or an STL or a wrl file, you can just import it. If you need to draw it, then probably you want to use Rhino or something similar, and then export as a wrl to make the bricks in 3DEC. See this example.

I did it by using AutoCAD to draw and import file to 3DEC but the geometric didnt appears and when i try different extensions like stl the geometric imported with mesh on it and i can’t use block commands even when i used block generate from-geometry.

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For a model like this, you probably want to export as .wrl so that each block in the CAD drawing becomes a block in 3DEC (as in the example above). However, if you want to generate tetrahedral blocks from a closed surface mesh, that should work too. You need to ensure that the surface mesh is closed with no holes in it. IF you want to send to 3decsupport@itascacg.com, we can look at it.