No, they are definitely not friends! Scaling, and a number of other operations, can cause the same problems.
It is hard to explain the cause of this. Basically, the creasing has to be recalculated under some specific circumstances. Some 3D programs store a andquot;crease angleandquot; with the object and the program uses that to recalculate the creasing whenever necessary. 3DC works a little bit differently. 3DC has a general andquot;Crease Operationandquot; that operates on objects, faces, edges and points.
With 3DC, creasing and materials should be applied once the object is andquot;doneandquot;. Fortunatly there is an easy solution. If you are just scaling and shifting an object you can recover your creasing by moving the scales and shifts to an earlier location in the operations list. Just select the shift/scale operation in the list and click the down button until it precedes all of your crease operations. Just make sure that you don’t move it below any non-crease operations and that you don’t change the order of non-crease operations since that can have some interesting (and intentional) results. One you have moved your shift operation just click on the final (upper most) layer and all creasing will be reapplied.
Atlernatively, you could select the last operation before you did your creasing and apply the shift there and then click the final (upper most) layer to re-apply all creasing.
Does that make sense? It think it is harder to explain than to use.
Richard