Nebuly lines

[Searcher]

The central rosette of the f86 (Rosettes) contains three artistic ornaments: bulbs, wavy (nebuly) lines and rays

I would also mention the prominent "pipes". I think the image on the right appears in Don's collection. According to You are not allowed to view links. Register or Login to view., it represents the four winds and comes from Konrad Kyeser, Bellifortis, Germany 15th century, Besançon, Bibliothèque municipale, ms. 1360, fol. 4v.

I agree, especially as because their number are 72.

---

Set a task to draw a flower (not from life) to 10 people, you will see 10 different pictures.
Set a task to depict something abstract to 10 people, you will be wondered of that you see.
Set a task to depict something abstract, but earlier represented by someone, with the aim to make its sense obscure / unrecognizable, and, in the same time, to save its indications. Well, this is the most difficult task.
Everyone can see two mountains or volcanoes on the f86v3, at least, something close to each ones. Try to depict the left mountain in view from above, but just in the same style. I think, we will see a picture, close to the central rosette of the "Rosettes" chart.
See below my examples, including that, how I would depict (generally)  the left mountain of the f86v3 and the central rosette in side view (without towers and tent) in the usual way.


As was mentioned by Marco, the border pipes could represent 72 angel's trumpets, i. e. imply 72 angels surrounding the foot of that mountain.