Your example looked interesting so I tried it.  I'm learning to hate
functions :-)

Attached is another version of the code that sorta works for me.

Thanks for posting.



"James Taylor" <jim### [at] blueyondercouk> wrote in message
news:3ce1a000@news.povray.org...
>
> "Slime" <slm### [at] slimelandcom> wrote in message
> news:3ce03d2f$1@news.povray.org...
> > Change
> >
> > #declare fn_water = function { h1*( fn_1(x,y,0)*exp(-k*x) ) }
> >
> > to
> >
> > #declare fn_water = function { h1*(
fn_1(x,y,0)*exp(-k*sqrt(x^2+y^2)) ) }
> >
> > And the exponential falloff will be dependant on the overall distance
from
> > the origin, rather than just the distance along the x axis.
> >
> >  - Slime
> > [ http://www.slimeland.com/ ]
> >
> >
>
> figured it...for reasons beyond my comprehension, all y values actually
need
> to be (1-y), hence the function is:
> #declare fn_water = function {h1 * ( fn_1(x,y,0) * exp( -k * sqrt(x^2 +
> (1-y)^2) ) ) }
>
> thanks
> jim
>
>

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