Yesterday I have posted an assetpack comprised of 12 textures from photos i 4096x4096 px size. Link below:

Ground (sand, gravel, dirt grass) textures

All thanks to RandTextureGen creator: 

See also previous assetpacks:

Sand textures

Snow textures

Clay/ceramic textures

P.S.  RandTextureGen images are licensed under CY-BY, so don't hesitate to use it for free even commercially. 

If any issue or tech support needed, contact me at: okl9212r@gmail.com