I have not created a model for rendering sand waves, and sand dunes form differently than water waves so there is no easy way to fake them. I can't do nice graceful sand dunes yet, but this image simulates an area where the winds change directions often.
I created the dunes by rendering one normal set of waves, then rendering another with two perpendicular waves (so it created a strong interference pattern), then merged the two in Bryce with the 'minimum' option.
Created by Mark L. Hessenflow
9. February 1996