Wow nice activity on the topic.
Meanwhile I tried Zoltán's suggestions with the white solid color effect and switching off alpha channel but the result unfortunately the same.
I can see you guys really know this stuff with multiply
transitions and the math behind it. I can't even argue with any of you but the fact is fact. The transition is used to work but now it don't.
Maybe it was only a bug in R5 and now in R6 its behaving the mathematically correct way but I think we liked the R5 version better. I could live with the fact that multiply
is theoretically faulty if it produces that nice smooth transition.