Hair ref would be awesome! Thanks!
https://www.3d.sk/photos/search/query//thumb/small/standard/1/premium/1/category-73/Hair/page/1

Decals of specific features like a hole in the wall with re bar or dripping dirt., etc.
http://environment-textures.com/category/1348/decals

There are no american building images in the repository. Most cities for games are centered in America.
https://www.environment-textures.com/category/1001/buildings/1985/high_rise81/1052/high_rise__textures

Can you upload photos of musical instruments like pianos, electric guitars, acoustic guitars, drums, violins, saxophones, trumpets, trombones, tambourines, microphones, maybe a recording studio, and recording booth, etc.
http://www.environment-textures.com/search/photos/set/12409/thumbs/small/page/1

Supermarket references ;)

with the photos of cars and other vehicles, can you please ALWAYS get a photo of the front, back, and side, as well as the top of the car and interior. The close-ups of the headlights and tail lights, etc are great, but some of the photo sets either don't have the photos of the rear of the vehicle or the interior photos.
http://environment-textures.com/category/1010/vehicles/253/car

Mosaik floors, ornaments
https://www.environment-textures.com/category/1009/tiles67/1343/mosaic_tiles

old wallpaper, victorian style, clean, dirty, peeling off the wall
http://www.environment-textures.com/category/1174/paper2/1470/wallpapers