That looks very promising - I'll work on it this weekend! Thanks!
--
-David

"Greg M. Johnson" <gregj:-)565### [at] aolcom> wrote in message
news:3d64dc9e$1@news.povray.org...
> bumps(x+delta,y+delta,z+delta)
>
> delta= constant*sin(clock*2*pi)
>
>

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