On Mon, 19 Nov 2001 13:27:24 +0200, Kari Kivisalo <ray### [at] engineercom> wrote:
> This is how gamma in povray works.

Thanks, if it is all true it is best ascetic tutorial about it :-)
Why it can't be described within documentation this short way ?

ABX
--
#declare _=function(a,b,x){((a^2)+(b^2))^.5-x}#default {pigment{color rgb 1}}
union{plane{y,-3}plane{-x,-3}finish{reflection 1 ambient 0}}isosurface{ //ABX
function{_(x-2,y,1)|_((x+y)*.7,z,.1)|_((x+y+2)*.7,z,.1)|_(x/2+y*.8+1.5,z,.1)}
contained_by{box{<0,-3,-.1>,<3,0,.1>}}translate z*15finish{ambient 1}}//POV35

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