Found 57 Indoor CC0 textures in library

Beige Wall 001
Beige Wall 002
Brick Floor 003
Brick Wall 001
Brick Wall 003
Broken Wall
Brown Brick 02
Brown Planks 03
Brown Planks 04
Brown Planks 05
Brown Planks 07
Brown Planks 08
Brown Planks 09
Castle Brick 02 White
Castle Brick 07
Castle Brick Broken 06
Concrete Brick Wall 001
Concrete Floor 02
Concrete Floor Worn 001
Dark Wood
Dark Wooden Planks
Factory Brick
Floor Tiles 02
Floor Tiles 04
Floor Tiles 06
Floor Tiles 08
Green Metal Rust
Grey Plaster
Grey Plaster 02
Grey Plaster 03
Laminate Floor 02
Large Red Bricks
Marble 01
Medieval Blocks 03
Medieval Wall 01
Medieval Wood
Metal Plate
Old Planks 02
Painted Concrete
Plank Flooring
Plank Flooring 02
Plaster Grey 04
Polystyrene
Running Track
Rusty Metal 02
Sandstone Blocks 08
Scuffed Cement
Slab Tiles
Square Floor
Stone Tiles
Tiled Floor 001
White Plaster 02
White Rough Plaster
Wood Cabinet Worn Long
Wood Planks Dirt
Yellow Brick
Yellow Plaster