In article <3d4e43c9@news.povray.org>, "Slime" <slm### [at] slimelandcom> 
wrote:

> > > probably best result will give isosurface - using inside() function and
> > > twist/rotate along Y axis.
> >
> > Best?!? Slowest and most likely to produce artifacts, if it works at
> > all...isosurfaces don't like infinite gradients.
> 
> If an isosurface is being used only for the purpose of the inside()
> function, it will be very fast and perfectly accurate. Only one function
> evaluation is necessary.

If it is being used only for that purpose, using an isosurface is 
completely unnecessary...use the function directly as a pattern. And 
since POV 3.5 has the mapping warps, using a function to do the same 
thing is just making it unnecessarily difficult. But I think he was 
talking about using it as an actual isosurface, since he mentioned an 
engraved appearance.

-- 
Christopher James Huff <chr### [at] maccom>
POV-Ray TAG e-mail: chr### [at] tagpovrayorg
TAG web site: http://tag.povray.org/

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