> clipka<ano### [at] anonymousorg>  wrote:
>> Am 11.02.2011 09:43, schrieb Bruno Cabasson:
>>> Lots of photons here ....
>>
>> High dispersion count, too, I guess...
>>
>> Looks awesome!
>
>
> ior = 1.5
> dispersion = 1.1
> dispersion_count = 768
> gather_min = 128
> gather_max = 512
>
> 127+ million photons (highly diluted far from lenses...)
>
> I could not get rid of the interference fringes, probably due to spiral pattern
> of the shooting. The solution could consist in making them sub-pixel, but this
> means also lower resolution for a smooth result, or even more photons! Another
> shooting method could avoid these fringes.
>
> The actual diameter of the incoming beam (cylindrical light_source) is smaller
> than the one rendered, and corresponds roughly to the center part of it. Due to
> gathering?
>
> Render time: about 8 hours on a dual Xeon 3Ghz. I had to mask the prism side
> pointing to the camera, otherwise, rays get lost forever inside the prism.
>
> Bruno.
>
>

Any jitter for the photons? It can greatly help getting rid of those 
"interference fringes".
Another thing that can help is to use more samples for your media. Here 
also, jittering can help somewhat.


Alain

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