As an avid user of photographs in the public domain to create textures from, I've decided to put some textures I've made for Frog Days in the public domain. These textures come from photos I've taken either with my cellphone camera or my actual camera and edited by me in Photoshop CS6.
All of these images are free to use in whatever you need them for, free or commercial, no need credit needed.
https://creativecommons.org/publicdomain/zero/1.0/That is, if you find them useful. None of these are really up to today's texture standards, but maybe if you're making a game with old-style 3d look you'll find them useful.
All of these are tiling images so they can be used with texturing options such as "generated" or "global" in Blender. Useful for when you don't want to worry about UV mapping and seams!
Originally grimy car paneling, but maybe it can be a smooth stone floor. Size: 512x512
The metal from a car engine. Size: 1024x1024
Plastic surface, useful to give a surface a bit of variance and texture. Size: 512x512
Tree bark, for trees. Size: 1024x1024
Lemon skin. Size: 1024x1024
Meat. You can make a meat cube, torus, hallway, what could be more beautiful than a wedding ring with a meat texture, huh! Size: 1024x1024
Tiling cloth black/white image. I've been using this as a bump map to supplement folds when dealing with cloth. Size: 1024x1024
An unnecessarily high resolution texture from the seat belt in my car. Size: 2048x2048
Part of a palm tree. Size: 1024x1024
Tree bark for a smaller tree. Size: 512x512
Wood for furniture! Size: 512x512
I'm sure I'll post more, but for now these the ones I've made that are of good enough quality to share.