Here’s my example contribution! I got shadows on my Markers by clicking the Default Material button up-top in the viewport and tweaked the light. The two crabs are referenced and linked using the Link Solvers command under Ragdoll → Edit.
Stay tuned for updates, I’m thinking I’ll have the top-crab somehow defeat the lower crab in a battle to the death!
Achieved by re-parenting the crab root control to the box that’s jumping around. I got Locomotion to walk backwards using the trick from this thread here: