I was asked to do a snow scene, which I have always wanted to do. Any tips or direction?
There’s a few tools like snowflow that can make snow for upfacing surfaces, it’s largely based on particles hitting the top surfaces of objects and they get fed into a blobmesh. Bertrand (of course) put up some modelling and shading tips too - 3D Snow Creation Tips by Bertrand Benoit - 3D Architectural Visualization & Rendering Blog
I did find some things online and I found a slew of tree models with snow on them.
Itoosoft also has a forestpack snow tutorial with sample files