I'm a 2D artist but what I do is making Minecraft arts... I have my own style.
And this brush is one (and only for now) of my custom materials that are used for final touches on my Minecraft themed illustration.
I only have snow particles for now but I'll make more when I need them.
How to use?

Simple, just select the brush, and drag on da screen.
But!
Maybe you want more snowflakes without brushing it too much? There's a way.
In order to make the snow particles appear lower amount or higher amount, adjust them by using this slider;

The smaller the number the more snow you get, the bigger the number the less snow you get.
You can also adjust the particle density but I forgot to unhide the slider so, just look around yourself I guess.