I created an 2D animation that simulates real-time handwriting on a fake chalkboard background for a title card on one of my videos. I did all the writing with Grease Pencil (and a tablet), and I used a Build modifier to keyframe it all automatically (which is quite an awesome feature, I must add !).
How can I do the opposite, which is animate the subsequent erasing of those handwritten GP lines (with a invisible “brush” going back and forth across the background, like a real chalkboard) ? The Eraser tool does not seem to work with the Build modifier (unlike the Pen tool). It just deletes whatever I select instantly, without any kind of animation.
Thanks in advance,