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It seems to be 'normal on' instead of 'normals on' (discovered by
trial-and-error method).
It now is reasonably fast (2 minutes and 40 seconds with 'normal on' and
1 minute 19 seconds without). Good job.
It seems to work better now, but why does the "fake" gap look so different
from the real gap? It doesn't look wrong, just different.
Here is (again) the test scene:
global_settings
{
#if(version=3.1)
ambient_light 4
radiosity
{ count 300
nearest_count 5
error_bound .2
recursion_limit 2
low_error_factor .5
gray_threshold 0
minimum_reuse .015
brightness 8
distance_maximum .1
}
#else
ambient_light 0
ini_option "Preview_Start_Size=8"
ini_option "Preview_End_Size=4"
radiosity
{ count 120
nearest_count 5
error_bound 1
recursion_limit 4
low_error_factor .5
gray_threshold 0.0
minimum_reuse 0.015
brightness 2.8
max_sample 2
adc_bailout 0.01/2
normal on
}
#end
}
camera { location <-1.99,0,-1.99> look_at z*2 angle 40 }
light_source
{ <-1.99,.99,-1.99>, 1
spotlight point_at <0,-1,2> radius 15 falloff 15
}
difference
{ box { <-2,-1,-2><2,1,2> inverse }
box
{ <-.1,-.9999,-.1><.1,.9999,.1>
rotate y*45 scale <1,1,.5> translate <-.5,0,2>
}
pigment { rgb 1 }
normal
{ gradient x 1 slope_map { [0 <0,1>][.1 <1,1>][.1 <1,0>][1 <1,0>] }
scale 1.8
}
}
box { <-1.999,-1,-2><-2,1,2> pigment { rgb x } }
box { <1.999,-1,-2><2,1,2> pigment { rgb z } }
superellipsoid
{ <1,.3> rotate x*90 scale <.25,.1,.25> translate <1, .9, 1.5>
pigment { rgb 1 }
}
superellipsoid
{ <1,.3> scale <.25,.25,.2> translate <1, 0, 1.8>
pigment { rgb 1 }
}
superellipsoid
{ <1,.3> scale <.25,.25,.2> translate <-1.2, 0, 1.8>
pigment { rgb 1 }
}
--
main(i,_){for(_?--i,main(i+2,"FhhQHFIJD|FQTITFN]zRFHhhTBFHhhTBFysdB"[i]
):5;i&&_>1;printf("%s",_-70?_&1?"[]":" ":(_=0,"\n")),_/=2);} /*- Warp -*/
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That's why I was whining.
AFAIK currently the only place where we can see that normals do not affect
the radiosity by default and that it has to be turned on in the radiosity{}
block with "normal on" is in the complete history page:
December 9, 1999 - WinMegaPov
...
10. by default, radiosity will not use perturbed sufrace normals. Add
'normals on' to the radiosity{} block in global_settings to enable
this feature. This feature also now is now significantly faster and
better than before.
And as I said, the correct syntax seems to be 'normal on'.
Ps: My whining was only related to the documentation. The feature itself
is great.
--
main(i,_){for(_?--i,main(i+2,"FhhQHFIJD|FQTITFN]zRFHhhTBFHhhTBFysdB"[i]
):5;i&&_>1;printf("%s",_-70?_&1?"[]":" ":(_=0,"\n")),_/=2);} /*- Warp -*/
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