It seems like FreeCAD's "Assembly" (Assembly3?) support still is WIP, but not yet works.[0] BTW, FCStd-files with multiply bodies/parts already works. Here is

It seems like FreeCAD's "Assembly" (Assembly3?) support still is WIP, but not yet works.[0] BTW, FCStd-files with multiply bodies/parts already works. Here is a viewer link[1] for FreeCAD's built-in `ArchDetail.FCStd`[2] example model. [0] https://github.com/kovacsv/Online3DViewer/issues/312 https://github.com/kovacsv/Online3DViewer/issues/312 [1] https://3dviewer.net/#model=https://raw.githubusercontent.com/FreeCAD/FreeCAD/master/data/examples/ArchDetail.FCStd https://3dviewer.net/#model=https://raw.githubusercontent.co... (ATTENTION! Huge CPU/RAM load on start!) [2] https://github.com/FreeCAD/FreeCAD/tree/master/data/examples https://github.com/FreeCAD/FreeCAD/tree/master/data/examples