Shrubs, Pebbles, Rocks, Boulders, Wild Flowers

Just as it sounds:
Bushes (various colors), Wild Flowers (various colors), Broken Branches (browns, black, grey, white)
Pebbles, Rocks, Boulders (like the current rubble but more like rocks and various colors - greys, browns, green, white)
Scorch Marks, Floor Cracks, Wall Cracks, Floor and Wall Holes
Arrow Slits
Snow tiles