hi, i am currently working on the storyboard for a title sequence, and i have to animate it now.
As you can see in the picture i have a light blue background that has a circular shaped mask, and everything happens inside this mask in multiple layers on the back.
my problem is i want this mask to be animated, and to have a watercolor felling. so i thought of using video footage of ink, you know the typical video of ink falling into water and sort of expanding.
i have no problem making the video appear inside the ink stain, but my question is: is there a way to make a video follow the shape of an object? so i can make this ink footage adapt to different mask forms, for example a circle or a triangle, or even more complicated forms like, i dont know a human silhouette?
i am thinking something that stretches the video along a path with the shape of the object may be the solution, but i am kinda lost here.
Any help will be aprecciated, thanks for reading 
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