In article <39e5fc3d@news.povray.org>, "ian" <ian### [at] aolcom> 
wrote:

> I wish for this to be subtracted from my pool of water, as I dislike 
> normals when true displacement is available.

I think a better idea would be to make the water itself an 
isosurface...just use a plane function and displace it with a pigment 
function, maybe a wrinkles pigment.

#declare WaterFunc = function {pigment {...}}

isosurface {
    function {y - WaterFunc(x,y,z)}
    ...


You could also try a height_field, though the fact that it is made of 
triangles might give worse results, and the memory usage would be worse.

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

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