How to create 2d fog in Visionaire?

Hey, I would like to create fog which looks 2d and like a drawing, so it fits to my game. How is it possible with the particle system? Or is it better to draw the animation and start a loop?

You can sort of do stuff with the particle system by assigning images as textures for the particle system to use, however depending on the art style it might not look very good when it gets scaled up/down.