Hi all,
thanks to Dawoon's remarks above
Dawoon wrote:
The backlit atmosphere looks great, but the atmosphere is too visible from the front in the .Sci rendering.
I did some re-thinking about the Mie parameters, trying to realize the desired goal of a nice
blue backlit haze ring and
no significant haze visibility in head-on lighting of Pluto.
Actually, the solution turned out VERY simple: Just multiply the 3 entries of the Rayleigh parameter triplet by 1/3! That's it...
Atmosphere {
Height 130.0 # official value [km]
Mie 0.00012
MieAsymmetry -0.50
Rayleigh [1.66667e-6 1.8e-5 8.984733e-5]
Absorption [0.000367 0.000245 0.0]
MieScaleHeight 49.0
}
As a test, here are one king-size screenshot for backlit and front-lit Pluto, respectively:
backlit:[For a bigger view, click on images by all means!]Attachment:
pluto_backlit.jpg [ 116.57 KiB | Viewed 1802 times ]
front-lit[For a bigger view, click on images by all means!]Attachment:
pluto_frontlit.jpg [ 107.21 KiB | Viewed 1802 times ]
It's now quite perfect, isn't it?
Here is an MP4 video of the changing haze illumination upon rotation :
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++
From backlit to crescent Pluto+++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Due to the numerous similarities of the Pluto and Titan atmospheres, let me check whether the rescaling trick of the Rayleigh triplet also works for my Titan texture, where also the color of the haze ring in head-on lighting was too strong. The spectacular rose backlit ring should not be affected:
Here is what I get for
Titan with the
same 1/3 rescaling of the Rayleigh triplet:
Atmosphere {
Height 500.0
Mie 0.0001
MieAsymmetry -0.55
# Rayleigh [ 0.0 0.0 0.00017 ]
Rayleigh [ 0.0 0.0 5.666667e-5 ]
Absorption [ 0.000075 0.00030 0.00025 ]
MieScaleHeight 220.0
CloudHeight 220.0
CloudSpeed 65.0
CloudMap "titan-clouds.*"
}
backlit:[For a bigger view, click on images by all means!]Attachment:
titan_backlit.jpg [ 88.35 KiB | Viewed 1802 times ]
head-on lighting[For a bigger view, click on images by all means!]Attachment:
titan_frontlit.jpg [ 93.72 KiB | Viewed 1802 times ]
Fridger