I have the same problem (I compare AC27 to AC26). 3D looks horrible
(pixelated, bad antialiasing) and slow performance.Hope there's a quick
solution for this problem.
I regularly have the same problem (0.0000% zoom). Somehow it's related
to an error with stairs. When I delete the stairs the zoom problem is
always fixed. But then the stairs are gone, so it's not a working
solution.
