Keylight (1.2) Ignoring my masked areas

[NicolasTsibanoulis]

I've been working on video editing, specifically trying to remove a green screen background. However, I've encountered a problem where my subject, who's wearing a greenish jacket, becomes somewhat see-through during this process. To tackle this issue, I'm using the roto brush and auto-trace features to create a mask around my subject. However, when I try to apply this mask to the Keylight effect, it doesn't seem to work as expected. Despite searching online for solutions to this problem, I haven't found any helpful information. I'm really in need of assistance with this issue.

[Rick Gerard · Accepted solution]

You have the mask set to None. I also see that your Rotoberush is turned off. If you use Rotobrush, pre-compose the layer, moving all attributes to the new comp before you apply any other effects. If Rotobrush took longer than about 10 minutes to complete, select the Pre-comp and choose Composition/Pre-render from the menu to avoid possible Rotobrush effect failures, and crashes, and significantly reduce your project size.

[MarcoMenzler]

I had this problem and it seems to have to do with the source material. I rendered the clip into a standard mp4 and retried. Then the masking worked.