Finished up this tillable texture today, I think it came out pretty good, things I would change next time would be to spend a bit more time on the sculpt. Also I might look for better photo sources. I used pictures that I had taken at the park and the images were not the best quality.
Rendered in Marmoset and tiled in UDK.
Next texture will be rocks used for the banks/beds of the streams and rivers.
1024 diffuse/normal, 256 spec.