On 28/11/2017 11:31, Sven Littkowski wrote:
> Yes, you are right - changing the atmospheric colors does not lead to
> straight, expected results, but to unexpectable new colors. I believe
> (but I have no clue about media and density), that the reason for this
> color problem lays with the fact, that you specify the colors within the
> density map. 

No, The density map is not for the colour. The colour comes from the 
media setting.
The density map is used by Pov as a pattern to calculate the density 
through the volume of the media.

> I wonder, if there is a way to use neutral shades for the
> density map, 

This is where you are going wrong. You are thinking of the density map 
as a colour map.

> and move the color map into the pigment statement right
> below the coordinates of the cloud layer.

The pigment should be 100% transparent so effectively it has no colour.

I see that in the code I posted I had used a small amount of absorption. 
I was an egg and thought that it would obscure the dancer's feet a bit.
I used a little emission to give the cloud a slightly glowing effect. 
(It was a dream sequence after all.)

-- 

Regards
     Stephen

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