Lumetri Masks, they don't seem to be working correctly. What am I doing wrong?

[stevens70907226]

I just spent an hour tracking a mask. Basically, I put a blur affect on an adjustment layer with a blend mode change. A hand comes into frame and changes color (becomes over saturated), so I applied a mask. I painstakingly went frame by frame and adjusted the points to mask out the hand from the blur effect and when I went back to play, the mask was averaged: all the individual points I made were removed. 

Is this normal or did I do something wrong in masking? 

[Willy5FF0 · Accepted solution]

It happens so often that when I'm masking for a wipe/mask transition that either PP crashes or the mask just doesn't update all the points. I think this is just something that Adobe can't really put it's finger on how to fix that issue. You could try to right-click the video and use the "Replace by After effects comp" and do the same thing in AE.

[stevens70907226]

Thank you. I'm glad to know it's not just me. 

I'll take you advice and try it in AE. 

[Ann Bens · Accepted solution]

Dont see any issues with Lumetri masks.

Sometimes its better to put them on the clip itself.

If you track a mask manually make sure you start with enough points.

Dont add or subtrack points, use the same amount from beginning to end.

[stevens70907226]

Thank you. I did recude the number of points as the the maks tracked forward, so that might have been the problem.