Hi all!
I'm working on an Earth model with 4 nested spheres in Vue 5i. 1=Land, 2=City Lights, 3=Clouds, 4=Atmosphere

Having trouble with the atmosphere sphere. It needs to be less transparent just at the edges, so it shows up, but doesn't obscure the detail away from the edges. Setting transparency to additive helps some, but not enough. If i could set index of refraction to 0.999, that would work, but it reverts itself to 1.0 and 0.99 is not enough :o(

Maybe i need a function or filter curve? Anyone know what function would make the very edges of the head-on view of a sphere more opaque than the front? Or some way to simulate Rayleigh scattering? Have not tried volumetric atmospheres either?

Other ideas?
Extra points if i can also make the atmosphere edge fuzzy at the same time!
Thanks All!