Hey folks,

I'm working through Steven Knipping's Applied Houdini Rigids III – Vehicle Deformation v2, which was recorded in Houdini 18.5. I'm on Houdini 22.

No matter what I try, I end up at the same message:

Invalid source /obj/Fracture/rbdconstraintsfromrules1/switch_use_proxy

What I'm after is the metal deformation part of the course — sheet metal that bends and dents on impact instead of breaking into rigid chunks. I can't get far enough to see any of it working.

My assumption is that something in the setup points at internals of the RBD Constraints From Rules asset that have been moved or renamed since 18.5. But I don't know enough to work out what should replace that reference, and everything I've tried lands on the same error.

So: has anyone here done this course on a recent build? Is there a known way to translate this part to a current version, or is the honest answer to install 18.5 and follow along there?

I emailed the course author about two weeks ago and haven't heard back, which is why I'm asking here.

Scene attached, stripped down to the fracture object. Windows. Happy to post any other node info that would help.

Thanks in advance, have a great evening!