"Slime" <slm### [at] slimelandcom> wrote in news:3d419c20@news.povray.org

>> I notice little similar problem - glass with IOR and dispersion is
>> transparent (as it schould be) in 8x8 4x4 2x2 steps, but in last 1x1
> step -
>> glass is render as non-transparent

> In any case, it's intended to be that way. (Though I don't know why
> it's non-transparent during the first few steps.)

it's the other way round - at pre-trace it's OK - I can see background 
under my sphere[1] with color rgb .95 with ior ~1.5 and dispersion 1.2

in final 1x1 trace step - image is same, glass is acting as it was color 
rgb .95 filter 0

wait a sec. - i'll make some exapmples and put them on www :)

-- 
#macro g(U,V)(.4*abs(sin(9*sqrt(pow(x-U,2)+pow(y-V,2))))*pow(1-min(1,(sqrt(
pow(x-U,2)+pow(y-V,2))*.3)),2)+.9)#end#macro p(c)#if(c>1)#local l=mod(c,100
);g(2*div(l,10)-8,2*mod(l,10)-8)*p(div(c,100))#else 1#end#end light_source{
y 2}sphere{z*20 9pigment{function{p(26252423)*p(36455644)*p(66656463)}}}//M

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