Drop textures here. Supported names (png/jpg/dds, auto-detected if present):
  facade.png (generic fallback)
  facade_house.png, facade_residential.png, facade_commercial.png, facade_skyscraper.png, facade_industrial.png
  building_house.png etc same as facade_
  road.png (generic) or road_motorway.png, road_primary.png, road_residential.png, road_footway.png
512x512 or 1024x1024 tiling, DXT5 DDS preferred. Loaded async via KSPTextureLoader if present.
