background brown brown texture sponge texture texture abstract backdrop brown-paper cardboard color colors colour colours paper sheet smooth storage strength strong surface surfaces textures tone tones agar-mushrooms agaricus-bisporus appearance baby-bella baby-portobello brown-cap-mushrooms brown-mushroom caps chestnut-brown chestnut-mushroom cremini-mushroom dark dry edible fleshy folded folds food fresh fungi Gills Italian-brown Italian-mushroom mini-bella mushrooms original portabellini quality quantity raw Roman-brown-mushroom shape soft stalk stem Swiss-brown-mushrooms table-mushroom tasty underside variations vegetable vegetables wrinkled border browns circles design graphic groningen ovals vector wallpaper beam board center centered diagonal horizontal line lumber metal parallel pattern plank planks rhomb structure timber vertical wall wood wooden