Go to Outputs in the network view and tab-create an Arnold ROP. In Properties > Sampling, set Camera (AA) samples to 4 and Specular Samples to 3.
At object level tab-create an Arnold Light. Under the Light tab change Light Type to Skydome, Exposure to 1 and Samples to 2.
Create a default grid and double click the node to enter its Geometry level. Add some UVs by connecting a UVProject node. Under the Initialize tab, initialize to best plane. Under the Transformation tab rotate the UVs by 90 in Y.
Add a camera to the scene by tab-typing or using the yellow viewport drop-down. Place the camera at one edge looking along the length of the grid
Go to the SHOP and create an Arnold Shader Network. Inside the vopnet create the network below.
To linearize the textures set the input to sRGB.
Bump Height can be quite low, around 0.01.
Assign the vopnet by dragging it onto the grid or using the grid's Material tab.
You can download the result of this section below.