Rigged body appears distorted when moving I finally copied off the bones of a character I ripped from SFM, but when I rig them to the mesh itself (automatic weights option), when i move it in pose mode, it's heavily distorted aside from lower areas in the legs. Is there any way to fix this?
Seems that, some parts of your mesh are not attached to the bones,
Please try to use the Weight paint mode to add missing part of mesh to the respective bone.

Steps are shown below:




Red means full control, blue means no control, and in between those color, partial controls.