Mike Williams <mik### [at] nospamplease> wrote:
: Slow rendering when using +ua and antialiasing method 1
: (**details only on povray.pre-beta)

  There are no "details". That's all the info there is. Currently no-one
knows what causes this.

: Isosurfaces *much* slower in beta 7?
: (isosurfaces with "evaluate" are now very slow)
: http://news.povray.org/3bdf24b3$1@news.povray.org

  I think this one should be marked as "fixed in next beta".

  There are also two other bugs/deficiencies which bother me quite a lot,
but no-one seems to notice (for some reason):

  * When outputting to PNG, the wrong gamma correction value is written to it.
The value 1.0 is always written as gamma to the PNG, which is wrong. The
correct value to be written is 1.0/opts.DisplayGamma, which gives the correct
result. Another feasible solution is to not to output any gamma value at
all (I personally prefer this one) - this way PNG would work as all the
other possible output image types.
  This is extremely easy to fix: In png_pov.cpp in the function
PNG_Image::PNG_Image() at lines 640-641 either comment out these two lines
(makes it to output no gamma correction value at all), or else fix the
first line to:
          info_ptr->gamma = 1.0/opts.DisplayGamma;


  * Focal blur aperture has no effect with camera types other than the
persective one (focal blur is calculated, but the aperture is ignored).
This one is (well, at least seems to be) easy to fix. I have discussed this
in http://news.povray.org/povray.beta-test/19382/

-- 
#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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