I have a logo which has a triple loop the loop. and what I would like to do is have it covered up and then reveal it. I have used the paint tool to cover over it and then done a reverse to reveal but my problem happens when the loops cross over. It leaves the path of the upcoming loop instead of crossing over the path in the reveal.
Now, unless you have the perfect bezier mask here is where you might run into problems... Where the loops cross, you'll have the opposite problem you have now - you'll see the crossovers of the loops before you want to see them. One way around this is to create another layer that is a garbage mask that covers the little parts you don't want to see and just set the out-point on the frame you want them to appear.
The actual loops are already there in the logo. I simply put a paint line over the top, coloured it black and then erased and revealed. I will have a go at doing what you suggested... I think I understand what you mean. Thanks. It's just those cross over points when the loop backs onto itself which is causing the problem.
I get what you're doing now.... naaa I think you're going about it backward. You're erasing a black layer to reveal what's behind it. You should be animating a paint stroke and making that your mask source. Start over from scratch (almost) by following that tutorial I posted and you'll see what I mean about the tiny little garbage mattes you'll have to create that are only on for a few frames.