On 08/31/2016 03:53 PM, clipka wrote:
>> Only with radiosity off does the re-factored code match 3.7.0 -
>>otherwise none of the three match exactly.
 >
> That is to be expected, unless you choose particularly high-quality
> settings.
>
> You can also increase the chances of identical results by using the
> `+HR` command-line switch.
>

Sorry for my use of the word 'exactly.' Ignoring for the moment our 
current 3.7.1 code, I believe there is a systemic difference in 
radiosity results between 3.7.0 and the 3.7.1-re-factored texture code.

In the attached image the first row is the original NK0065, the second a 
very simple white texture. Both run with decent radiosity settings, on 
one thread and with +HR. The left result is 3.7.0, the middle the 
re-factored code and the right is the absolute difference between results.

The bottom or third row is the same NK0065 texture run twice with the 
re-factored code. The left image is with 4 threads and the right with 8 
threads to exaggerate the run to run radiosity noise I "think" you have 
in mind.

Not shown, but if I run the third row with one thread and +HR, I get no 
difference in result run to run.

Aside: To really see the difference images well the gamma might need to 
be tweaked as you view it.

Bill P.

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