Friends,
a "controlled" setting of the Mie parameters requires considerable understanding of Mie optical scattering theory beyond the level that we can possibly expose here.
For reference purposes, I recall again the formal definitions of the 6 Mie parameters as given by ChrisL quite some time ago:
Mie
A float value giving the fraction of light scattered per kilometer at the planet's surface ('sea level')
MieAsymmetry
Henyey-Greenstein phase function parameter for wavelength independent scattering. A floating point value between -1 and 1, with -1 indicating complete backscattering, 1 complete forward scattering, and 0 isotropy.
MieScaleHeight
Scale height for wavelength independent scattering particles. Height in kilometers at which wavelength independent scattering is 1/e of the value at the surface
Rayleigh
Wavelength dependent scattering coefficients. Three values giving fraction of red, green, and blue light scattered per kilometer at the planet's surface. To simulate Rayleigh scattering, they should be in ratios that fit the 1/wavelength^4 behavior, though this is not required.
RayleighScaleHeight
Scale height for wavelength dependent scattering. Currently ignored; MieScaleHeight is used for both Rayleigh and Mie scattering.
Absorption
Three values giving the fraction of red, green, and blue light absorbed per kilometer at the planet's surface.
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Let me add some further qualitative remarks about the essential effects these parameters have:
- A larger (negative) MieAsymmetry than on Earth (e.g. -0.55)
is responsible for the conspicuous "ring of light"
when the atmosphere is backlit (cf TITAN!)
- the Rayleigh RGB values indicate the color components that are to be prominent in the highest part of the illuminated atmosphere
- the Absorption RGB values specify the amount of absorption as visible in the backlit color composition of the "ring of light". R=0.0 means red remains (i.e undergoes ZERO absorption)! Etc.
Fridger