Worksessions has previously been discussed in Discourse (https://mcneel.myjetbrains.com/youtrack/issue/RH-37060). I have an issue with DGN-files which might be triggered by the solution on RH-37060?
When I open a DGN-file in Rhino 7 SR7 it display everything more-or-less correctly (except dimensions and hatches) and Rhino interprets the units of the file to be in meters, so I can work with the file right away. When I use File > Insert, File > Import - or File > Worksession to Attach the same DGN-file to an empty Rhino drawing in mm (using no template), everything is scaled by a factor 1000, without me being asked or given an option NOT to scale the drawing but only convert the units. A grid of 3000 mm ends up being 3000000 similar to if I was choosing YES to the question of scaling when using the Units command. Doing exactly the same in AutoCAD will give me a correct translation of the DGN-file in mm.
USER FEATURE REQUEST:
Both AutoCAD (DWG) and Microstation (DGN) allow each Xref to be “Clipped” using a polygon or a rectangle. Similar it is possible to “WipeOut” areas of the Xref’s so you then can add new geometry.
It would be really nice to have the same two features in Rhino - and Rhino should be able to read it.
Both AutoCAD (DWG) and Microstation (DGN) allow for “cherrypicking” objects from an X-Ref and place them as a copy in the current drawing. In AutoCAD this picking-operation is called “NCOPY”.