I was quite pleased with myself when I figured this effect out (below), however just tried it out for the first time with pp 5.0.2 and I get this:
a band of digital corruption that changes with the image.
The effect is a nested clip, duplicated in a new layer. Mode set to multiply. Above that is a mask that looks like this:
And then these are the effects on the duplicate clip
footage is 720p 50i from a canon 7d in a 25p sequence. Mercury playback is on.
Hmmm: I just tried rendering and it only rendered the section where there was an additive dissolve - but those were glitch-free. Could it just be a playback issue?
Retrieving data ...