Found 94 Terrain CC0 textures in library

River Small Rocks
Rock 01
Rock 04
Rock 05
Rock 06
Rock 08
Rock 2
Rock 3
Rock Boulder Cracked
Rock Boulder Dry
Rock Ground
Rock Ground 02
Rock Pitted Mossy
Rock Wall 02
Rocks Ground 01
Rocks Ground 02
Rocks Ground 03
Rocks Ground 04
Rocks Ground 05
Rocks Ground 06
Rocks Ground 08
Rocks Ground 09
Rocky Trail
Sand 01
Sandstone Cracks
Shell Floor 01
Snow 01
Snow 02
Snow 03
Snow 04
Snow 05
Snow Field Aerial
Terrain Red 01
Worn Rock Natural 01