Le 2021-02-07 à 02:23, Thomas de Groot a écrit :
> Op 07/02/2021 om 04:41 schreef Mike Horvath:
>> On 2/5/2021 6:56 AM, Bald Eagle wrote:
>>> it's likely not your media - but your media settings.
>>>
>>> try:
>>>
>>>
http://news.povray.org/povray.newusers/message/%3C59a9ec1c%40news.povray.org%3E/#%3C59a9ec1c%40news.povray.org%3E

>>>
>>>
>>>
>>
>> I'm not sure how that applies to my case. I am not using emissive 
>> media or the "samples" keyword.
>>
> 
> There is nothing really wrong with your code as far as I can tell and 
> from own experience. From the outside (of the media) it is even rather 
> fast due to the default intervals 1 and samples 1 (Yes! you /do/ use 
> samples, even if you don't).
> 
> However, depending on the location of the camera within or without the 
> media, render times can be very different; you even may need to increase 
> the samples value to avoid splotches, and that will decrease render time 
> even more although not that much.
> 
> Using media is time consuming. There is no alternative.
> 

The default for samples is 10.
samples default to 1 when using sampling method 1 or 2.
The default are, as of version 3.6 :

sampling_method 3
intervals 1 //DO NOT increase !
samples 10

Increasing intervals dramatically increase the rendering time without 
giving any appreciable improvement.

samples 10 intervals 3 render slower than samples 50 intervals 1.

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