So after some google searching apparently I don't even know what this technique is specifically called:
I'm trying to figure out how to create an effect in unity that 'paints' a 2d asset on screen.
By paint, I mean animates brush strokes, eventually 'revealing' the final image. (Start with outlines, then colors)
What is the conventional name for a technique like this, and where would I get started going about creating this kind of effect?
I am not talking about a shader / filter that simply adds a 'painted' or 'hand drawn' effect to an image, but one that simulates actually 'painting' it.