Found 67 Flat CC0 textures in library

Aerial Asphalt 01
Aerial Beach 02
Asphalt 003
Asphalt 009
Asphalt 010
Asphalt 011
Asphalt 012
Asphalt 013
Asphalt 02
Asphalt Floor
Bricks 004
Bricks 008
Bricks 016
Bricks 017
Clay Floor 001
Concrete 001
Concrete 002
Concrete 006
Concrete 007
Concrete 008
Concrete 009
Concrete 010
Concrete 011
Concrete Wall 004
Ground 001
Ground 006
Ground 016
Ground 026
Laminate Floor
Laminate Floor 02
Laminate Floor 03
Large Floor Tiles 02
Painted Concrete
Pavement 02
Pebble Cemented Floor
Plank Flooring
Plank Flooring 02
Plywood
Polystyrene
Red Mud Stones
Rock 001
Rock 002
Rock 004
Rock 020
Rock 021
Rock Boulder Dry
Rocks 024 L
Rocks 024 S
Rough Plasterbrick 05
Running Track
Sandstone Blocks 04
Scuffed Cement
Slab Tiles
Snow 006
Square Concrete Pavers
Stone Tiles
Synthetic Wood
White Plaster 02
White Plaster Rough 01
Wood 006