Hi PixelPost,

I don't know if this will help you, but you could try to take a look at these tutorials... as far as I could see you don't need any plugins to make them...

"Fly over a mountain" and "Thick clouds ahead" from this site... -->
https://cade.scope.edu/courseware/notes/phenomena/

and also this one... "Creating Clouds in Maya using Particle Clouds"... -->
https://www.3dtreat.com/pages/tutoria...age/index.html

regards

Strarup