Is it possible to vertex paint a tessellated material onto a non-tessellated material?

I am using vertex painting via a height lerp to add in some snow build up on top of some objects as shown in the screenshot, however I would also like to create some thickness to the snow to add some believably. The thing is I don’t want to tessellate the whole mesh, just the snow part that I paint on. Is such a thing possible? Or is there a better way of doing this?