The Scratches texture map produces a pattern that can be used for adding wear and tear to the surface of an object (figure 1). 


Scratches

Figure 1: The Scratches node and it's associated parameters 


Scratches Parameters

Layer Count - Controls the number of scratch layers. 

Curl - Determines the curvature of the scratches. 

Rotation - Adjusts the scratch orientation. 

Frequency - Controls the horizontal and vertical frequency of the effect. 

Steps - Adjusts the stepwise frequency increase from one layer to the next. 

Scratch Color - Determines the color of the scratches. 

Random Seed - Provides random variations to the pattern of scratches. 

Transform Pin - Positions, scales, and rotates the surface texture.

Projection Pin - Sets how the texture projects onto the surface.