Generate floor boards quick and easy, part III, vertex colors

A member at BlenderArtists really wanted to apply a random material to each individual plank. Now Cycles can generate a unique random number for each object but not for each face within an object so another trick was needed. I therefo , added a vertex color layer with a unique color for each plank. Vertex color layers may be accessed from Cycles with an attribute node as shown in the node setup below:

In the example we use the color directly but of course it can be treated as a random value to control some specific material property ad well, that is left as an exercise for the reader.

Code availability

The code is available on GitHub but as I hope to promote it to the Contrib repository one time, it's also in the Blender upload tracker.