Hi Jodon Do you know if there are any issues with occlusion culling in combination with AAS? We're having an issue where builds arbitrarily crash when we build occlusion culling (no problem in the editor). I don't know if it has anything to do with AAS, but I just did a new build of the same scene, but removed the attached sub-scenes, and so far it hasn't crashed. Obviously not much to go on, but is there anything you can tihnk of that might be the issue? Any settings or something in the setup that I should double-check, that might be setup incorrectly? We're using 5.2.3f1 Oh, and btw, we updated the plugin the other day, and most objects in the hierarchy have letter combinations after them. I've tried to find documentation for what they mean but have failed. Is there a description somewhere?