Download free texture atlas english oak from the category leaves. Decals can be used for oak, the texture has brown color. Substance PBR material was created using the photometric stereo method in a dimensional ratio 0.25 x 0.25 m.
PBR texture maps, size 4096 x 4096 px. for Specular or Metallic workflow in standard colors. You can use them in any 3D software and game engine.
Procedural material in SBSAR format allows you to get generated textures in high resolution. You can customize material directly in your 3D environment.