On 27-2-2019 17:39, Alain wrote:
> Le 19-02-27 à 03:55, Thomas de Groot a écrit :
>> A small test image with the corrected settings. What appears to be the 
>> horizon is in reality the semitransparent bounding box, the camera 
>> being situated just a tiny bit above it. The mist strands do not touch 
>> that upper boundary but be aware that their extension upward is 
>> controlled by the warp{turbulence} of 0.4 for the y-direction. So, it 
>> is a bit tricky to find the correct values for the density map without 
>> the strands piercing the container.
>>
>> Samples may be a bit low as there are some artifacts visible but I 
>> wouldn't change it as in your scene they would be hidden by the water 
>> texture.
>>
>> I have used here a somewhat denser scattering colour and also 
>> scattering mode 5 which I often prefer, here with excentricity 0.5.
>>
>> For this small scene, render time was about 30 minutes.
>>
> 
> When using turbulence, a rule of thumb is to assume that the area gets 
> enlarged by the turbulence value.
> 
> If you use turbulence 0.4, then, what was at 1 should be assumed to get 
> displaced between 0.6 and 1.4, and up to 2 for turbulence 1.

Exactly! Thanks for the precision given. This was one of the reasons why 
I gave the hint to try to put the scaling /after/ the warp {turbulence}. 
I didn't pursue that path too far though.

-- 
Thomas

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