Op 14/08/2020 om 16:16 schreef William F Pokorny:
> On 8/14/20 9:18 AM, William F Pokorny wrote:
>> On 8/14/20 7:34 AM, William F Pokorny wrote:
>> ...
>>
>> Hold off. I now have something simpler running in povr showing 
>> differences on continuations, but seeing other issues too. Perhaps 
>> jitter related. Need to sort it out, but but render turns fast so 
>> hopefully can get to some better understanding.
>>
> 
> OK. You found a continuation bug with radiosity (non saved).
> 
> Using my current povr and after turning jitter off somewhat easy to see 
> you can use continuation when using just lights, but not with radiosity.
> 
> The top row in the attached image is a foliage like isosurface sphere 
> which matches perfectly up to the first continuation. I stopped and 
> restarted roughly every render block row. I used a multiplier of 15 for 
> the isosurface image differences.
> 
> In the second row of the image I used a regular sphere, but used a 
> multiplier of 60 for the image differences. The issue is there with all 
> shapes, it's just harder to see on something like a sphere.
> 
> If I get fired up maybe I'll try saving radiosity samples (couldn't get 
> it to work trying quickly...). An outside chance that might fix it, but 
> given the circular patterns we see on the sphere, I suspect there is 
> some sort of offset in the sampling pattern on continuation. A bug no 
> matter saved samples or not - good find.
> 

Right! I shall try on my side to see if there is a difference when 
radiosity data is saved in the scene.

-- 
Thomas

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