Bump Functions
 

Bringing depth and structure to a texture can be achieved with the Bump functions. Different illumination and shadow casting techniques combine the texture with a Heightmap, which supplies the depth data.

 

The Bump functions:

Cast Shadows Darken unlighted areas.
Diffuse Combine transformed diffuse and ambient light.
Emboss Simple directional embossing.
Fast Shader Fast standard dot3 bumpmapping.
Homogeneous Light The opposite to the cast shadows function.
Point Light A radial light source at the center.
Quad Light Four light sources at the corners.
Sharp Emboss Single colored simple embossing.
Variate Slight structurizing effects.