"Made using 3DF Zephyr and Blender along with 38 pictures taken with my phone of a hand sized rock. Textures at 4096x4096, duplicated model and decimated one of them to around 13k vertices to save file size, then with the second (not decimated) I baked it onto the first to create a normalmap.
Did some adjustments to camera settings, with 0.25 exposure. one sun lamp (2.00 size, 20 strength 2048 bounces, R=1; G=0.9; B=0.9; A=1) for a bit more overcast type lighting effect.
Sampling with full global illumination, 1000 samples, 2K resolution

A gentle touch of saturation boost is done in post-processing"