Instead of using titanium, use zinc (since you are using acrylic). Zinc makes great clouds with acrylic because it’s transparent and so it doesn’t come off as chalky. Titanium isn’t and so it is much harder to control the transparency, at least, that’s how it was for me.

However, to me this looks like a digital painting, in which case textures are regularly imposed on a background as effects. It can be hard to duplicate them because it’s a different medium. If I were you, I would look into how falling snow has typically been represented with your own medium.

Acrylic is just for under painting I would go over it with oil paint when I got values right
Actually I saw other people getting same results for their painting so I know it’s possible even though reference is digital
I have one tube of zinc white that i never used before thanks for telling me that

I do not use acrylic, but you could try the following:

Mix the dark background using Payne’s Grey, or Prussian Blue + Burnt Umber + Permanent Rose matching the area on the upper right.

Cover the entire canvas with this mixture. Once completely dry, mix white with your original grey recipe, and create several tones, trying to again match what see the picture. Scumble this on the now dried background, use a rag is necessary to clear make your cloudy effect.

Acrylic was only for underpainting for next layer i would use oil
Thanks for the recipe I really like it