Wear and Tear with the Curvature Shader

The curvature shader is an easy way to add detail and realism to your shaders. In this short tutorial, we will use the curvature shader to create a wear and tear shading effect. It will be used to represent where the edges of a hard surface are scraped on the model of a mech. Notice in the image above how the edges of the paint appear worn off, exposing the metal underneath.

Without noise shader	With noise shader

Bias

• In the example images below, the bias parameter of the curvature shader has been increased and exaggerated to better demonstrate the effect.

bias: 0	bias: 0.5 (default)	bias: 1

Samples

•  Increasing the number of curvature.samples reduces noise and gives a better quality result.

curvature_samples: 3	curvature_samples: 6