For some reason the opacity rendering test does not work in software rendering modus. The rendered image has no opacity, however, if I build everything with Mesa on my machine and save a screen shot, the screen shot contains opacity, but the comparison of the rendered image against the reference fails.

First, I save a screen shot from the test.
Second, I compare the VTK renderwindow against a reference. Internally, another screen shot is made. This comparison fails in software modus!

This used to work some commmits ago, but we didn't change anything except we introduced a new method for swiveling which is not called in the opacity test.

Party_hardcore bug!