Octane for Houdini

The Rain Bump procedural texture produces a rain drop-like pattern that can be easily animated (figure 1). 

Figure 1: The Rain Bump texture applied to a Glossy material on the Octane logo 

Rain Bump Parameters

Time - Provides control over animating the texture effect using LUA scripts. 

Ring Count - Determines how many rings each rain drop will produce.

Ring Size - Specifies the size of each rain drop. 

Density - Controls how many rain drop will be generated. 

Strength - Acts as an opacity parameter for the visibility of of the rain drops, higher values produce brighter effects which will produce a stronger bump effect. 

Random Seed - Changes the pattern of the rain drops. 

Sharpness - Blurs or sharpens the effect of each rain drop ring. 

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

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