"St." <dot### [at] dotcom> wrote:

>
>     You're quite right. Thanks Jim. (That page loaded SO much faster than
> when I tried it the other day!)  ;)
>

BTW, here's a (quick-loading!) link to the technical paper he wrote on the
subject.

http://local.wasp.uwa.edu.au/~pbourke/papers/dla3d/

Ken

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