Blackmagic Forum

Sorry to say, but this one is pretty annoying and took me a couple hours to figure out...:-/

It goes like this:
- Open the comp
- View the BG, activate the PolyMask (so that you can see it's outline)
- Press play and see the actual Mask fit the Polyline (woohoo!)
- Now press "Render" and see how the Mask becomes *completely* useless
although the "outline" still seems to move correctly....

Workaround:
Take a BG and attach it to a CornerPositioner,
animating the Corners the same way as the polygon.
Cheesy, but works in this case.

Please fix this at your earliest convenience.

Thanks.

It's the published points. When any points are published, the output isn't cached. Every tool downstream loses cache too.

Thanks, Chad.

But there is no workaround for that, is there?
And it only happens on Render-time, not with interactive playback.
(Which made it so annoying to figure out...)