POV-Ray : Newsgroups : povray.binaries.images : Steam Fog: First WIP : Re: Steam Fog: First WIP Server Time
3 May 2024 05:32:34 EDT (-0400)
  Re: Steam Fog: First WIP  
From: Alain
Date: 27 Feb 2019 11:38:53
Message: <5c76bd1d$1@news.povray.org>
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.


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