Ron Parker <ron### [at] povrayorg> wrote:
: True.  Though setting variance to 0 might cause it to be slower than 
: setting variance to a suitably low number and confidence suitably high; 
: at least then POV can bail out when it actually attains that low variance 
: and high confidence.  When variance is zero, you require it to use the
: maximum number of samples for each pixel.

  I have came to the conclusion that variance 0 is the only way of making
it work. For some reason if you set variance to anything higher than 0,
no matter how small, you'll get graininess. (Of course there might be some
exceptions with certain scenes, but that's what I have noticed with most
scenes.)

  It seems to be a "fact" that the human eye forgives more easily random
noise than sharp color transitions, and montecarlo sampling is (I think)
based mainly on this principle. However, random noise has always bothered
me and I have never liked it; I almost prefer the sharp color transitions.

-- 
#macro N(D,I)#if(I<6)cylinder{M()#local D[I]=div(D[I],104);M().5,2pigment{
rgb M()}}N(D,(D[I]>99?I:I+1))#end#end#macro M()<mod(D[I],13)-6,mod(div(D[I
],13),8)-3,10>#end blob{N(array[6]{11117333955,
7382340,3358,3900569407,970,4254934330},0)}//                     - Warp -

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