Water, earth and air

[nablator]

Just to clear up what I meant initially, I wasn't saying that the pattern always means a boundary, nor that it never means air, but I don't believe that the pattern in that saturn image represents the element of air. 

Agreed.

In this manuscript You are not allowed to view links. Register or Login to view. all the roundels of planets are surrounded by a cloudband, not only those ruling an air sign. So it's not the planet-sign-element association as I thought in this case. IDK.

The "planet-element association through sign" is represented in these planetary roundels from Sphaerae coelestis et planetarum (ca. 1470): logically only Mercury, Venus, and Saturn are surrounded by a cloudband pattern symbolizing Air.

Sun rules Leo (Fire) You are not allowed to view links. Register or Login to view.
Moon rules Cancer (Water) You are not allowed to view links. Register or Login to view.
Mercury rules Gemini (Air) and Virgo (Earth) You are not allowed to view links. Register or Login to view.
Venus rules Taurus (Earth) and Libra (Air) You are not allowed to view links. Register or Login to view.
Mars rules Aries (Fire) and Scorpio (Water) You are not allowed to view links. Register or Login to view.
Jupiter rules Sagittarius (Fire) and Pisces (Water) You are not allowed to view links. Register or Login to view.
Saturn rules Capricorn (Earth) and Aquarius (Air) You are not allowed to view links. Register or Login to view.