Micro Normal Tiling/Strength cannot be set independently for head vs. body skin materials
Adjusting Micro Normal Tiling or Micro Normal Strength changes the head and body skin materials simultaneously. I can find no way to assign different values per material. Because the head and body UVs have different texel densities (or whatever the reason this happens is), a single shared value cannot produce matched pore scale — the result is a visible micro-detail density mismatch at the neck seam that cannot be corrected inside CC5.