Moving long mesh on the uneven surface

Bump. The topic is actual.

Double bump.

You’re missing the basics here.
There are plenty tutorials/guides on how to setup IK using IK joints, but the fact that in a week you haven’t found an answer probably means that you didn’t even look for one.

As for now, I have moved the long mesh into another, more flat place, swapping it with the bipedal mesh. The topic is not actual.