Quick and easy. Since base game and across packs adding other kinds, trash pile textures are simply way too dark. It wasn't until I personally went in and edited them that I even realized the piles contained actual trash and weren't just random smudges. There's visible chunks of actual stuff in there, but the texture is too dark.
You can see edited textures and some of the before/after examples here.
Here's one example of a before/after. Pay particular attention to the milk jug at the bottom of the big pile, and the lunch box above the big grey rectangle!
