Houdini Automatic Alpha-Fill Setup [Indie]

What After Effects users need (admittedly amazing) plugins for, us Houdini folk can whip up from a few nodes. Or get it here!

Takes an image with alpha as input, returns a luma matte. You can select one or multiple starting points and either trace along the surface (write-on effect) or by proximity (great for a bunch of separate shapes). The second mode even has a parameter to slightly (or strongly) offset each island, so you can get some nicely staggered reveals. It's not a HDA, nothing is blackboxed, process is quite self-explanatory. But if you have any questions, let me know.