What happened to the THZ2 and HHZ skyboxes? (and other levels)
I really can't tell if this is a bug or I have something messed up in options, but 2.2.9 seems to have messed up skyboxes of several levels—every level where there's actual sector layout in the skyboxes, that is. THZ2 and HHZ are just examples thereof. Here's a THZ2 comparison (2.2.8 and 2.2.9 respectively):
and a HHZ comparison (same version numbers):
Other levels with ACZ1 have similar skybox issues, but I don't think there's a need to also show those. What exactly is going on?