This first beta fixes also a few bugs like rendering issues for mirrored windows and staircase missing in the plan when its height is equal to level elevation.

IF you're looking at transparency issues - a just want to note a recurring problem (not new to 4.2b):

The enclosed home looks ok in the 3d window initially. But
- the translucent glass of the window is visible through the tree.
- and if I move the tree, the roof behind starts showing through (in front of) the tree. (un-check, check roof visibility and the roof moves to the back).

demohouse_okh_models_transluc.sh3d

It renders well in photo. Same effect in 4.2b5 as it was under 4.0. NOT a big deal, but I have noticed the same issue several times. I think it happens only when two objects with transparent elements overlap.

ok