To cure background problem wrt SR4: Load P5 Go to Material room"; select "background"; delete all unattached nodes. Go to "Edit->General Preferences"; hit "set preferred state" That should cure it for all new scenes. For re-loaded PZ3 files (if you need to change the background) you'll have to go through the process again for that file then re-save the file (sigh) I think.. Cheers, Diolma