In article <39e70212@news.povray.org>, "ian" <ian### [at] aolcom> 
wrote:

> The problem is that the pool of water is not evenly shaped, and needs 
> to refract light properly. It is a set of loop-stacked cylinders 
> inside a slightly larger vessel of the same shape. It is currently 
> solid with a media interior.

What I meant was that you don't need a box function for this, you can 
use a simpler plane function(you can't get much simpler than "y") in the 
CSG, because only the top surface has waves. Perhaps I misunderstood 
what you were asking about, but I thought you wanted a box function with 
a displacement.

(I just had an interesting idea: a spherical or toroidal swimming pool, 
in a large room aboard a spacecraft, held in place in the center by air 
jets and magnetic fields, but otherwise free of support. What do you 
think?)

-- 
Christopher James Huff
Personal: chr### [at] maccom, http://homepage.mac.com/chrishuff/
TAG: chr### [at] tagpovrayorg, http://tag.povray.org/

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