Hi,
I'm woundering - is it phisicaly ok that light (interior - fade_power) 
fades to black ? imho light should fade to some color.
But using fade_color same as pigment color results in no fading at all.

I.e. think about human's skin.
I.e. we have 3 small splinter's inside humans finger (drastic example ;)
All are white.

The object that is at 'depth' of 0.1 mm will have normal white color.
This at depth 2 mm will have ie 50% it's color, and 50% of skinns color, so 
it will be bright-"orange".
And this at dethp over 5 mm will be in fact invisible from outside.

How can I simulate this in POV ? Maybe little example (box=finger, 
sphere=splinter)

-- 
#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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