Hi all, I am creating scenery models with FSDS 3.5.1 and MakeMDL, but I am experiencing "random" deletion or misplacement of parts. The attached image shows a hangar model in FSDS (top), but when compiled as a scenery MDL, the main part moves out of position (bottom right). It appears OK if I render the model as an AIRCRAFT (bottom left)!! With other FSDS models, I also get (seemingly) "random" parts missing from the visual model in FS. Adding or deleting parts makes a different random set of parts not appear! This seems to happening to about half of my FSDS models - some are OK. I am really pulling my hair out with this, as there appears to me no rhyme nor reason for it - any help/suggestions appreciated! Thanks, Iain.