stavrogin

If you use chrome, this works great

try using $F in the file name for example a sequence starting with texture.1.jpg would be texture.$F.jpg

Here's one way to do it with vellum grains. torus_ball.hip

I'd also like to know why groups are not recognized in Vellum constraints node... seems like a very annoying bug. Looks like it only recognizes the stretch and bend output groups.. UPDATE: It only accepts the constraint group groups, and the groups don't transfer by default. There is an easy work around though. Just make sure it's a prim group, and then plug a group transfer node in between the solver and the last vellum node.

Nope. use a pyro fx sim ( shelf tool has many good ones), then create a new geo and advect the particles with with the pryo sim. If you are serious, I suggest you watch this one https://cmivfx.com/houdini-ink-fx