Water, earth and air

[Jorge_Stolfi]

What do you think of this one? Looks like nebuly lines to me. Is it a "wolkenband"? Is it a circle with little knobs on bigger knobs?

I know practically nothing of heraldry, but from the few examples I have seen it seems that a "nebuly line" is most often rendered as a simple line with knobs. No little-knobs-on-bigger-knobs, no thick edges, no shading to suggest a pleated ribbon seen edge on.  

And the term seems to be used only in heraldry.

Isn't that so?

So I would say that the last example you showed is an instance of wolkenband(s) and not of nebuly line(s), because (1) it has the graphical features listed above, (2) it does not seem to have anything to do with heraldry, and (3) it is a frame to indicate that the scene is set in Heaven not Earth.  

All the best, --stolfi