Refine NPC fabric UVs and remove baked AO blotches

CHANGELOG.md

@@ -10,6 +10,9 @@ Semantic Versioning.
 
 - NPC albedo, normal and ORM maps are now 256² instead of 128², giving the
   face, fabric and gear materials more detail at portrait distance.
+- NPC fabric maps now repeat four times across the body and skip the baked
+  per-character AO, removing the large blotchy patches from shirts, jackets and
+  trousers at portrait distance.
 
 ## [0.9.4] — 2026-11-02