news:8j53kukhb4fuuhbeluqe2ce72p0m4biavt@4ax.com 

> When mosaic preview were applied there was circle of image only. Black
> area appeared when 1 pixel statge started. Rendered on P4 with final
> 3.5. 

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


-- 
#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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