The textures shown were made using Photoshop. I first started with the grainy wood texture in which I was able to add a grain effect to a base brown color with the diffuse cloud effect. I added knots that would make the tree look realistic.
For the cut end of the log, I grabbed a picture of a log and edited the log to give me just the end, and then added a grainy wooden texture background that would match the graininess of the base wood texture.
I made this texture for use in any outdoorsy woods scene that the player can walk around in and get lost in as shown in the final result log pile.