Hi(gh)!

After fiddling around with the settings from rad_def.inc (and not 
getting near anything really looking good), I searched the Web for a 
tutorial on PoV-Ray radiosity and found this: 
http://www.simnet.is/hildurka/content/tut1page.htm

So I carefully worked through the steps described there - but when I 
came to the final setting (see code below), I noticed that my scene 
matched Mrs. Andresdottir's example scene as far as brightness of the 
shadowed parts is concerned - but still contained considerably more 
artifacts than her really clean scene (seventh from top, just above the 
version with area_light).

In her tutorial, Mrs. Andresdottir does not give the version of PoV-Ray 
she used, as her original code contains a switch for versions newer than 
3.1, I assume that it is 3.5 rather than 3.6 (which I use). Could it be 
that 3.5 uses different default radiosity settings than 3.6? Or is it 
because Mrs. Andresdottir places the whole scene inside an (monochrome) 
ambient 1 sphere rather than a gradiented sky_sphere?

Here is the code:

       radiosity
       {
         brightness 1.5
	count 300
	error_bound 0.05
         gray_threshold 0.8
         low_error_factor 0.2
         minimum_reuse 0.015
         nearest_count 10
	recursion_limit 5
         adc_bailout 0.01
         max_sample 0.9 // -1
         always_sample 1
	pretrace_start 0.08
	pretrace_end 0.01
         load_file "whatmough_residential.rad"
	save_file "whatmough_residential.rad"
       }

The only difference to Andresdottir's original code is that I use a 
gray_threshold of 0.8 rather than 0.

See you in Khyberspace!

Yadgar

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