I am new to blender and I created a character consisting of separate meshes (Coat, Scarf, Hand, Face etc...). In order to control my meshes under a rigified rig, I created a lattice mesh that covers all of the other meshes. Lattice mesh is attached to the rig and works perfectly. All the meshes except hands work in harmony. Here is the detailed explanation of the system.(Lattice mesh is the wireframe one and covers everything.)
Lattice mesh deforms nicely with the rig, as well as all the clothing except the HAND. The problem is, when i rotate the hand this happens. The rig looks like this and not all the bones are green. Weight paint of the lattice is good and hand doesn't exceed the boundaries of the lattice.
How can I get the hands not deforming badly when rotated? Any help would be very apperaciated. Thank you for your attention/help.