p.s., Re: 256^3

["From: Bill Hibbard <hibbard@xxxxxxxxxxxxxxxxx>" <billh@xxxxxxxxxxxxx>]

I said:

> 256^3 is 16m grid points. A VisAD FlatField will let you
> pack one value per grid point.

I meant "pack one byte per grid point". You'd do this using
an appropriate range Set in the FlatField constructor
defining a sampling of no more than 255 values.

Cheers,
Bill