Getting started with converted STL to DXF I converted the STL file through an online converter https://www.cadforum.cz/catalog_en/stl2dwg.asp

(I work in the program autocad 2017)
Now I open the resulting DXF and I don’t know how to work with it. How do I merge polygons into a whole model?
I figured it out. Need to go: Network -> conversion to surface

Then we get a surface that is already easy to work with.