How do you make textures for games WITHOUT drawing them?

1

OpenGameArt.org

Https://opengameart.org/ (Check license, some have demands.).

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2

AmbientCG

#Online Services #Tool #Image Marketplace 86 social mentions

3

Shadertoy

Search stuff on shadertoy.com for opengl opensource on procedural textures/shapes (and noise functions as a common basis-fucntion), https://www.shadertoy.com/results?query=cellular seems to be a good entry point, gut any space-filling curve must never be underestimated (they are fast code), because 1 shooter-game successfully used the hillbert-curve for procedural level design.

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