Any way to use volume constraints on a character

[josemendez]

Hi, i've been trying various techniques to get the best breast physics, and ive found that the softbody physics do a poor job at preserving volume, so i want to test out the baloon volume constraint on obi cloth for it. However i notice that skinned obi cloth does not include it

Is there any way that i can use regular obi cloth to drive a small section of a skinned mesh, in a similar way to attaching obi softbodies to a mesh?

Volume constraints require a closed volume for them to work. Character breasts are not closed since there's no sternum/chest wall behind them to result in a closed volume, so you can't use volume constraints with them right away. They would only work on the entire character's mesh, but characters are also not usually watertight volumes (there's holes in the mouth, eye sockets, etc), so that's also pretty unlikely to work on most meshes. That's why skinned cloth does not support volume constraints.

You could however model two closed "fake" breasts (like balloons, fully enclosing a volume) attach them to the character's chest bone, and write a script to drive mesh deformation using the simulated particle position's. This isn't trivial though.

kind regards,