Hey Dave
Thanks for this solution although there are a couple of issues which either I am missing or won’t work.
First and foremost , using the Stroke Effect I don’t see a Brush Position parameter. There is a Start and End Parameter… But no Brush Position. Are we talking about the Basic Stroke Effect? I am using AE v.7.
Secondly, my mask has to move because the background is from a 3D Program and we are tracking across the map, so within the frame the “route” is moving.
I have actually used the Stroke Effect to reveal along a spline but that was in a more locked down 2D world.
I guess the bottom line is that masks CANNOT take advantage of Roving Keys. I will keep experimenting and see if I can come up with a mixed solution.
Thanks again.
TAK
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