Hellow,
in simple scene (prisms scene - I will post it in .b.i soon) I have problem 
with focal blur. It looks like POV ignores confidene/variance stettings and 
always just uses blur_sampels samples per pixel...

Following settings had given me same results (both in time, and in image)

  blur_samples 100
  aperture 0.03
  variance 1/256
  confidence 0.999

and

  blur_samples 100
  aperture 0.03
  variance 1/2
  confidence 0.3

should't second version render *much* faster ?

-- 
#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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