Le 15-08-03 03:16, Le_Forgeron a écrit :
> Le 03/08/2015 05:27, Anthony D. Baye a écrit :
>> I need a water material that looks good under multiple light sources
>> but doesn't
>> bog down when I render it with radiosity.
>>
>> The water in my scene is taking forever to render, and I've disabled
>> everything
>> but the normal pattern.
>>
>> Part of the problem might be a low aa threshold combined with a small
>> focal
>> blur, but the rest of the scene renders acceptably quickly.
>>
>> I'd appreciate any help.
>>
>> Regards,
>> A.D.B.
>>
>>
> A bit more context please: is it water for indoor (such as inside tube,
> glass, bottle) or outdoor (and kind of latitude: the sea of polynesia is
> far different from the waves of scotland, same water, yet not the same
> final colour).
>
> Maybe also limiting the trace level, if it does not impact too much the
> result, might provided a speed up. Default is 5, which in 3.7 counts for
> the reflexion but not the transmission when the ior does not change. If
> you have a kind of echo chamber (two partially reflecting surfaces on
> each other) it might skyrocket the number of ray to launch, and the
> render time. Tunning down the max_trace_level can reduces that echo
> effect (but might impact realism if it's an important aspect of your
> scene).
>
> Are you using media in your water ? why is there a normal pattern ?
> (what is the normal pattern in use ? can it be simplified or removed ?)
>
>

I often find it beter to increase adc_bailout than reduce max_trace_level.

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