I'm working on a shot where I'm using a sphere to push a cloth through a hole in another object. Up to a point, the sphere acting as a collision object works great. However, the cloth slips off the sphere halfway through the sim. I was hoping I could animate an "Attach to Geometry" Vellum constraint to ensure the cloth sticks to the sphere after a certain period of time. I can't seem to figure out how to animate any constraint properties though. I'm doing it at the sop level using Houdini Apprentice 17.0.352, if that makes a difference.
I tried making a simple scene with a grid and sphere through vellum constraints. The idea was to let the grid fall to the ground and animate the stiffness value on an "Attach to Geometry" to pick it back off the ground, but it doesn't work. I also tried the "Attach Frame" setting on the "Attach to Geometry" constraint, but that doesn't seem to do the trick either.
Are Vellum properties set at the beginning of the sim and unable to be changed? Or is there some secret sauce I need to add? Do I need to do this in a DOP network or change values upstream in a wrangle?
I can't seem to find anything but beginner Vellum materials online at the moment. Thanks!
EDIT: Solved! Check Noobini's responses in this thread.