[earth.jpg]
https://visibleearth.nasa.gov/images/57735/the-blue-marble-land-surface-ocean-color-sea-ice-and-clouds/57737l

[grass.jpg]
https://www.goodtextures.com/

[ground.jpg]
https://www.sharetextures.com/textures/ground/ground-5/

[rock.jpg]
https://www.sharetextures.com/textures/ground/ground-stone/

[uv.png]
http://uvchecker.byvalle.com/

[wood.jpg]
https://www.sharetextures.com/textures/wood/wood-fine-24/
