There is a discussion about MSG based quilt pattern generator processors and how to use them available here.
the quilt pattern generator processors are designed to be stacked together to create more complex patternings. The example above uses 2 stacked 3C QuadBlock Tile CP processors to create the abstract procedural patterning. It's also using built in drop shadowing to build a sensation of depth into the image. The MSG preset for the example above is attached below.
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John--Belated thanks for this, and all of the other very helpful MSG examples!