I got it right this time... the render not the B.D. date.  So happy birthday 5
days early Ken.  The Star Wars models URL was a unintentional gift for all I
guess.
To explain about the render problem and fixes: I had messed up on how to go
about the CSG difference of the height_field from the ground sphere.  Needed
inverting is all.  However the fog was the major problem, I neglected to
remember that filtered fog color always wreaks havoc on transparent objects
(media containers and the like).  Was an ugly fix to that since I still needed
the filtered color in this scene or it throws everything out of place.  I put
the camera inside of a filtered color sphere instead and didn't use any
filtering of the fog.
Hope that makes sense.  Cheated on the kicked up sand, it's media but was so
smooth (I couldn't wait on the method 1 type) I had to add "noise" to it in PSP
by post-process.  Sorry.

Bob

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