This one uses a SLA-gradient instead of a single color. I
though it could be fun to see the color of the cloud
change with different lightning conditions.
So this are the gradient parameters,
keep in mind the the color of you cloud changes with
different lightning setup. So you might first change the
(additional) light to the desired position and after that
play around with the gradient colors.
LUMINANCE
Now it comes to Luminance. Banji has a high value to get
more Luminace on thin areas and darker areas where the
clouds are thicker.
Brightness has a low value to give only a lite overall
brightness for the cloud.
Banji has a pretty high Illumination value. You can
set that up to 1000. It's set so high to give the cloud
better bright areas. The Contrast and Shadow Intensity
has values in the middle to get dark areas that are not
too dark and not too bright.
TRANSPARENCY
Transparency of course is used to make the clouds more
transparent. So using the 'Soft' alpha channel option
otfen is not enough to give the cloud the desired
brightness and look. Transparency is used to chance that
look.
ALPHA
Now the look of our cloud. As usually we use bhodinut 3D
Noise.
In this case we use 'Wavy Turbulence' as a base for
our cloud. 20 Octaves makes the cloud more detailed. To
cut off too many white areas we use a 'Low Clip' of 35%
and a 'Contrast' of 75%. Changing this values will give
you a more or less clouded sky.
To reduce the contrast between the bright and dark areas
again a middle gray color is used for the option 'Color2'