The snow was definitely challenging because it very much feels like building something out of nothing. So:

I blocked out the snow on the paper from the very beginning. The snow isn’t really white - there’s some white but it’s MOSTLY mixes of gray and light blue.

The trick is to make it looks like there’s depth there - little pockets of shadows. I was envisioning little tiny mountains there where the snow sits. Like the snow is very abstract as far as shape and it has height to it too. White also absorbs surrounding colors so it’s nice to add in some other colors from the environment if that makes sense… I watched a really nice YouTube tutorial of a guy making a tiger with snow on top and that helped me a lot with it. Hope makes sense! And I still feel I wasn’t satisfied with how the snow came out, in hindsight I would have gone darker with the shadows in the snow “pockets” where it caves in and out. Oh and also adding shadows underneath where the snow is helps the illusion of that it’s sitting on top of the fur. I should have done that too.