I'd animate a mask on a solid to grow the way you want. Then I'd use the Stroke effect on that layer. The result: the box grows, but the stroke width doesn't change.
1 person found this helpful
Hi, this is probably a bit late, but for people looking to do this in from now I have created a tutorial that goes through the process of doing this. Some expression manipulation is involved but it isn't too difficult!
I would do this with a shape layer. Animate the size of the rectangle and not the stroke. Do not use Scale.
That's right. I too use the size to "re-size" the rectangle, the issue comes when you want it to be done from a corner of the rectangle. I fix this issue in my video.