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/ ]
