I’m working on a project where the drafts are made in AutoCAD by a colleague and I have to make the 3d model. I opened the .dwg (AutoCAD 2007 format) in Rhino and saved the new file as a .3dm to use it for creating the model. I noticed that saving the file took a lot of time and the program would briefly show the message “Not Responding”. So, I checked the file sizes and it turns out the original 13MB .dwg was saved as a 110MB .3dm. I tried purging, then deleting a good chunk of the drawing, then purging again (all of this done in Rhino) but I only shaved off about a mere 3MB.
It’s not a procedure I haven’t gone through before. Typically, the resulting .3dm has pretty much the same file size as the .dwg.
Any ideas what is going on? And hopefully, any way to reduce the file size?