I understand. But I have done several renders from several angles thinking that might be the case, even trying to apply a neon shader to the whole model. It still comes up missing. I was hoping it was nothing more than a optical illision; but it appears to be more than that. The missing elevator shaft is part of another part. The sequencer tray does show the parent part; but the parent part is missing geometry. Sort of like two spheres connected by a straw. That combination is one part. The problem is the straw is missing. It isn't named separately in any program. Thanks for your reply. I'm grasping at straws now! (Bad pun intended, unfortunately)