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[solvespace] whitequark commented on issue #88: Unfortunately this won't work, as there is no way to construct an arbitrary bounded solid right now. You should not convert STL to entities (which is very inefficient anyway), but rather import it in a similar way as .slvs files with the "convert NURBS surfaces to triangle mesh" setting checked are imported. https://github.com/solvespace/solvespace/issues/88#issuecom