Quick test painting across Genesis Victoria 6 material zones in Substance Painter. Simple fill layer, fabric material with displacement. The trick I used for this is as follows: step 1 - group all Genesis surfaces belonging to FACE, TORSO, or LIMBS in one of these three newly created Surfaces using DS geometry editor, step 2 - export a base level OBJ (so without any SubDivision) with these new Surfaces. step 3 - combine the FACE, TORSO, and LIMBS UV-islands into one new UV-map using an external UV-editor, I used 3dCoat for this, step 4 - paint a new (single) 8k texture map set on the OBJ exported by 3dCoat in Substance Painter, step 5 - split the exported maps back into separate FACE, TORSO, and LIMBS texture maps in Photoshop. step 6 - assign those new maps to a Genesis figure in DAZ Studio, pose, and render.