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For what it is worth, I generally use the following radiosity settings,
to full satisfaction:
pretrace_start 0.08
pretrace_end 0.004
count 100, 1000
nearest_count 10, 5
error_bound 1
recursion_limit 2
low_error_factor 0.3
gray_threshold 0.0
minimum_reuse 0.015
maximum_reuse 0.1
brightness 1
adc_bailout 0.01/2
normal on
media off
always_sample off
This is quite fast and I experience little or no artefacts. Note the
dual (optional) parameters used for count and nearest_count. This can
increase the quality of your render without slowing it down much. See
the following page of the wiki:
https://wiki.povray.org/content/Reference:Radiosity#count
You may also want to try stochastic rendering with, e.g., +am3 +a0.01
+ac0.90 +r3. If you do that, change count to 10 all other radiosity
settings remaining the same.
--
Thomas
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