The shape of the clouds is entirely done inside of the cloud material with a single noise node.
The snow glitter is far from being final. What you see in this screenshot was done in roughly 10min to have at least something.
I will not go into detail how I did it in this version. I will do that when Snow V2 is finished.
In case you want to recreate exactly what I have done here a screenshot of the glitter part of the material.
The MF_LinearMaskSizeSmooth material functions just increase or decrease the white part of a greyscale mask.
And yes everything in the prototype is done with blueprints.
I’ve just started to learn UE4 C++ to move almost everything to C++ to increase the performance and refine the architecture of the system.