Pat, The file that you earlier had imported... did you save it to the library? If you could and did, then the problem probably isn't with that file. I have found meshes with inverted facets or UV coordinates (they are obvious upon rendering... if you ever wondered what someone's hair would look like inside out) but they usually don't affect everything loaded afterwards. Hmm... Was one of these 3ds files grotesquely huge? (Like more than enough to consume your system's resources?) Carolly