I tired of snow looking like a foam on many renders I saw online, so this is my attempt to achieve more natural-looking snow in Corona Renderer. This material is good for almost every scenario, maybe except macro photo. It's not a single-button thou. Mainly controlled by Size parameter in Noise maps linked to displacement, displacement Max. level and Radius scale in Subsurface scattering tab. You also can adjust Glossiness values in Reflection tab to achieve more rough or icy feel of the shader.
It depends on the UVW scale of the object to which it is assigned and is sensitive to low polygonal geometry. Triplanar mapping doesn't work with procedural noise very well, but for some scenarios, it's good to have it in reflection slot, so I keep it there. But displacement doesn't look good with noise and triplanar combo, so I decided to not link parameter to real-world scale for now. If you know how to make friends with these two maps in one chain I'd appreciate some advice.
In general, if you know how to apply noise maps in your workflow, you can deal with it.
I achieved this kind of results with this shader, so I think it would be helpful for others :)
