I feel like this may be a very stupid question, but I haven't been able to find it in the tutorials I've been following.
I am using an animated mask to color correct the sunlight coming in through a door that is opened and shut during a scene. I'm using a mask wich has a keyframe for each frame the door is open and it looks great. Problem is, I don't need the mask after the door is shut. How do I limit a mask to a certain number of frames in a clip? Thanks.