I recently found out someone made unofficial edit of my map dr_4halls. The latest official version is V6, but someone made a V6a. I've managed to get a hold of a copy of this v6a version and I would like to find out what changes they have made. I have tried using the 'Diff map file' function which places "similar" items in a visgroup named as such, but according to the VDC the function is broken and incomplete. When I tried it, it seemed to put most things in that visgroup. So either whoever edited the map made a lot of changes, or that function of Hammer is broken. So what I'd like to know is there any other way you can compare changes between 2 versions of the same map in order to work out what has been changed?