JH nous apporta ses lumieres en ce 2008/02/14 10:47:
> Following up on my previous question, but perhaps asking it more clearly:
> 
> 1.  Is +SR/+ER supposed to give the same results as an extract from the full
> image?
> 
> 2.  Why doesn't it for my images?  (I get slightly different shadings in each
> band.)  Could it be because of radiosity?  I've already turned off jitter
> ("-J"), though I don't know if I have to do that.
> 
> Thanks.
> 
> JH
> 
> 
> 
When using radiosity, the part of the scene that are not rendered are not 
treated the same as those that are actualy rendered.
You start by doing a render at a lower resolution and adding "save_file" in the 
radiosity block. Turn off antialiasing. You can also remove several transparent 
objects, like window panes. This will save the radiosity data to a file.
Those radiosity data are resolution independent.

You then do a second, full size or partial, render, with "load_file", 
pretrace_start 1 pretrace_end 1 and "always_sample off". Leave everything lese 
in the radiosity block the same.

There will still be some banding, but much less.

-- 
Alain
-------------------------------------------------
I believe that banking institutions are more dangerous to our liberties than
standing armies. Already they have raised up a monied aristocracy that has
set the government at defiance. The issuing power should be taken from the
banks and restored to the people to whom it properly belongs.
Thomas Jefferson

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