Hi ! By trial and error, seems to be something about the mesh itself, as these modules will 'YZ' misbehave on their own.... I've tried re-saving from 3DOC and Open3Mod viewer, no improvement.... Here's zipped lo-poly example, 'SmallDoor.OBJ', texture paths edited to local rather than Author's E: ...... Import at 45~50 % of original. XYZ rotations all work. x-rotate upright. (-90) drop to floor, YZ now tied together.... ... Restore object, XYZ rotations all work again, x-rotate upright. (-90), Y-translate ~1.625 to level with floor, YZ now tied together again....

Weird, or what ?? N https://www.dropbox.com/s/2bs8lsputtjf6b4/door_qq.zip?dl=0