The texture node: 

• Factor node output: it is a black-and-white output that you can use as a factor (as a mask)
• Normal node output: simply connect it to a normal input node (adjust it with the “Normal Strength” and “Distance” values found below)
• Round (0) - Square (1): choose between round and square-style patterns (works best with 0 or 1, values between the two generate funky results)
• Size: set the size of the pattern
• Extrude (values between 0-1): bevel-like effect (note: it only works if the Normal Strength & Distance is not zero)
• Line Variation (values between 0-1): lower value adds more lines/strokes; higher value adds more islands
• Seed (Variation): endless variations
• Random (values between 0-1):
• Brightness and Contrast: adjust the brightness/contrast of the output Factor node (this value is the same as if it were a “Bright/Contrast” node)
• Detail: adds more level of detail to the lines
• Normal Strength (values between 0-1): set the strength of the normal map (normal output node)
• Normal Distance (values between -1-1): set the height of the normal map (normal output node)
• Mapping input: connect your texture coordinates