Fans as Flow Direction Markers

Fans. Image A has cones, image B has straight feathers, both are upward outflow direction markers. But beneath the half-circle (a portal shape) of image B, there is a curvy shape that you see in the hub of image D's fan. That's an inflow marker, so image B's fan is probably bidirectional.

Probably, this is based on seeing it accompany other inflow markers like those curvy features. As a standalone shape, I'm not sure yet. Image C is an inflow with the slender little lines that you also find on a lotus-symbol, so it means downward flow into the head, whereas the black part is a sideways outflow. Image E and D use feathers with a curve on the top, which means downward inflow.

The Pope's cone shaped hat is an outflow symbol, the fans are the divine/higher-density downward inflow. Image F and G have opposite polarities, straight feathers upward, curved feather-tops mean downward. But there are also bull horns meaning downward, and side snakes beside the curved feathers are upward. The style of horns running very horizontally is marking the barrier between realities. Not shown, but I'm sure you are familiar with Egyptian scales having a curved feather and a container (supposedly for a heart). That container is an upward outflow symbol, and the opposite polarity is curved-top feather. So every time you see someone mention Maat because of a feather, you can apply an extra meaning. Image H is a curved axe blade, a shape resembling the hub of the fan of image D's fan. Axe blades signal downward inward flow, but often there is a spear tip too for outward, so many are bidirectional.

I'm a fan of fans.