Here you are, sorry about the blur kernels

The map took 3h for me to design and then 3h for WM to run... I think the heavy snow is also pretty pricy in cpu cycles. Also, the colouring macro is slightly modified in a hacky way.
There is one color map being taken from an external snow texture, used only on the lower "roughed up" snow - just substitute any snow texture you like in its place and it should look fine. I had to zip the tmd because the forum complained about "invalid file extension".
There is a custom specular map, based entirely on slope. I am not sure whats meant by blurry but not blurry, for me it looks like everything is lightly dusted with snow, which is how I remember my skiing holidays... it could be the specular not caring whats snow/rock or it might be something to do with the atmosphere settings, which were cribbed from Arturi's Avalanche.