Here you are: a Python 3.7 version of the snow machine. Its version is V3.0.0, and the name of the script differs from the original, to avoid any problem.
The Firefly part remains the same, the script has been adapted to the new environment, plus a few details, For example, it remains floating above Poser.
The advanced tab has one new parameter: the scale for the displacement node

You may download the Python file here:
https://kdrive.digital-paradize.com/app/share/116364/2a6289f5-2a0e-4d28-8531-a9eb36bf6c5d

I am of course opened to any suggestion to enhance it, as it relies on my mid-level knowledge of Poser's materials 
This year, the snow has a weird look, lol...

𝒫𝒽𝓎𝓁

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(っ◔◡◔)っ

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