Some recurring symbols I used in the campaign:
Flatland: A romance of many dimensions, by Edwin A. Abbott, a Square.
http://www.alcyone.com/max/lit/flatland/.
A hint at multidimensional geometry. In the setting Flatland was a popular
television cartoon and movie.
The sun, oranges, fire etc – energy, centrum. The Dwellers.
Darkness, the sea – the Entities
Vampirism, possession, Vikram and the Vampire (http://www.sacred-texts.com/goth/vav/)
- the Symbionts
Hunger, the yearning for flight – the destiny of the Novas.