POVMAN nous apporta ses lumieres en ce 30/05/2006 05:12:
> Can anyone tell me in laymans terms what the "pretrace" settings in 
> radiosity does?  My recent renderings have not shown any significant 
> differences when changing this value.
> 
Using smaller pretrace_end values can allows you to use lesser radiosity settings
while preserving 
the quality. In some cases, this can improve the rendering time. Shifting
pretrace_start a little 
bit up or down can, in some cases, reduce or remove some artefacts.
As each pretrace step use half the tile size as the preceding, it's probably best to
use a 
pretrace_end valus that is = to pretrace_start / (2^x) "x" been 1 less than the total
number of steps.

-- 
Alain
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