This material contains 2048x2048 normal and height maps, the diffuse color is made by color ramp. You can tweak the color, glossyness, displacement amout by default.
It would work better if you plugged the output of the normal image texture into the Normal Map converter, and then into the two color shaders. Connecting an image texture directly to a shader's Normal input doesn't do much.
It would work better if you plugged the output of the normal image texture into the Normal Map converter, and then into the two color shaders. Connecting an image texture directly to a shader's Normal input doesn't do much.