The Smooth Voronoi Contours texture node generates a Voronoi pattern that is typically used for fractured shapes, however, this node generates a smoothed version of a Voronoi fracture (figure 1).
Figure 1: The Procedural Effects node applied to a scene object
Figure 2: The Smooth Voronoi Contours node and it's associated parameters
Frequency
Determines the base color underlying the other iridescent colors.
Time
The animation time stamp used to pan the textures across a surface.
Adjusts the color swatches to provide a glossy-friendly Voronoi pattern.
Transform
Positions, scales, and rotates the surface texture.
Projection
Sets how the texture projects onto the surface.