Fri Aug 31, 2018 11:30 am
Hi Scott,
That's a really useful video, it captures the issues you're working with very well.
Your definitely on the right track (no pun intended). Some of the issues you're seeing are workflow related, but the weird sizing of the points of the roto is definitely what I consider to be a Fusion bug.
I think it has been reported as well, but it's impossible to check since BMD doesn't keep a public bug tracker.
I've experienced the same things as well. It appears that the points/handles etc are scaled alongside the actual footage. This shouldn't happen of course, but it does. Also as soon as you insert a planar transform tool, the splines get a little weird. The fact that they don't always update at the same time is definitely a bug and not related to your graphics card.
I like to use matte controls to create mattes in combination with the tracked polylines.
The spline in the planar tracker is just to assign the area of information where the tracker should look for patterns, it's not supposed to be exportable, although it would be very convenient if it were possible as a starting point for your manual roto, definitely a wishlist item.
Your example of the cornerpin is accurate, but you're overlooking one option: if you use for example a matte control tool inbetween the BG and the planar tracker, than you can cut out the shape you want the corner tracker to use. So you could cut out a circle and feed that into the planar tracker and it will only show the circle. Internally it will be the rectangle of course, but it respects the alphachannel.
As for feeding the mask into the merge node, just don't do that. Masks aren't meant as creator tools as such and Fusion isn't too well equipped to deal with masks as images (which is probably part of the reason some of the bugs we're seeing are there)
So yeah, you're definitely on the right path.
Sander de Regt
ShadowMaker SdR
The Netherlands