Whenever I used rotobrush, it's perfectly fine. But then, when I switched to the hand tool while using rotobrush, or the selection tool, the unmasked part (background) just turns purple, so I only see the masked part. Before, I didn't have this issue, and I don't know how to fix it. It's bothering me a lot. Here's photos of it.
When I have ALT+W:
When I have the selection tool or handtool:
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Replies
What you are seeing is just one of the ways Rotobrush displays the matte:
I see things in your screenshot that tells me that you probably have probably not gone through the Rotobursh section of the User Guide. When Rotobrush was introduced I couldn't figure out how to use it without doing some homework.
I have one more thought. I am assuming that the shape you are trying to mask is animated. Generating a procedural matte using something like Color Range. I took your screenshot into AE, created a comp, then one click with Color range gave me this:
This was 3 clicks:
The whole thing took about 3 seconds. I don't think Rotobrush is the right tool for this project.
 
 
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