Is there a way to have an IK chain or bendy bone that stretches?

Two examples I can think of would be a cartoon tongue and this guy’s sword. v

Skip to 4:14.

Bendy bones work great for that.
Check out this:

It’s about a stretchy lip setup, but surely also works for stretchy tongues and swords…

This should help a lot with my rigging, and not just with the examples I mentioned. Thanks. :smiley: