I think I've found a bug. I have a complex .obj file that I import, then I save this after applying durfaces etc. the object. Then I save this file as a .dn file. Then I create a new file, import the .dn file I just saved. The reason for doing this is that I have many variations I have to render, using the same object. I only want to add the object surfaces once. Problem is that sometimes I end up importing a previously imported object from a .dn file. This seems to cause the file size to grow! For simple objects, it's only a small amout, but for complex ones, it's significant!
Further on this, this bug can be avoided by exporting the specific object from Dimensions, as a .dn file, then importing it to a new dimensions file.
Therefore, when you import an entire dimensions file, it seems to be importing alot more than the objects. Even after removing everything from the scnene, lights, background, etc. my file size is still 2Gb.
Yes, better to export selected object than all dn file as the second one includes all scene properties.
a dn file includes other info yes... also its a bad idea to save your workflow models as Dn because they become corupt when you update Dimension builds
always store models as wavefront Obj mate... saves heartake