Hi,

I'm wanting to be able to add some simple animation to an anatomy model. The model has a basic exterior skin as well as interior nerves, blood vessels, etc.

I understand I can set up a bone system to move the arms, fingers, etc. of the exterior skin, however, how do I get the interior nervous system and blood vessels to follow as well?

Just wanting to possibly move the arm, and have the hand move fingers. Nothing complicated.

https://www.turbosquid.com/3d-models/3d-human-nervous-systems-brain/666060 [www.turbosquid.com]

That's the model I'm wanting to do this with if possible.

Thanks,

Jim

In theory the biharmonic skinning setup should just work, as it uses a volume of tetrahedrons to calculate how weights transfer from the joints to the mesh, rather than how default skinning methods just work across the surface of meshes.

In practice you'll need to do lots of tests, as the tet conversion process can get confused by thin geometry. Potentially you could convert the outer skin to a tet volume (or just a tet mesh as its more usually called), biharmonic skin that, and use it as a point deformer on the internal organs/structures.