Tested that idea now, and the results remained the same as a hall of mirror. I'm not entierly sure what we are doing much differently, but it seems some are still experiencing problems with this, while some such as yourself are getting it to work. I followed the exact steps you have given, and yet this is not working. Now would be a great time for a developer to inform us exactly how to do it, since there is much confusion on a topic that should be simple.
sonic10000 says he has got it working with one quantity of thing 780 in the desired skybox sector, yet the maps in zones.dta use two quantities of thing 780, one regular and one with object special. I have tried all methods stated and observed, yet none work for me. And viewing Virtual's VirtualRealm pack, he seems to be having similar problems in the boss fight, except in his position his skybox appears and disapears at different occasions.