Hello there!
I wondered about the stars. In the cave of Yliakum, could we imagine networks of fluorescent mushrooms or irradiating crystals? It would act as stars.
I can\'t figure out how inhabitans of Iliakum can count hours with the level of water of the last level. For the ones living in it it\'s easy but for the ones living in Iliakum, how could they know about time? Why should the azure sun have continuous variation of brightness? Why couldn\'t it work with discrete state of brightness? For exemple between 12 and 24 level of brightness, each of them lasting one hour? With variations in respect of each seasons?
Another thing about the sun, in lower level which don\'t receive the light of the light of the azure sun but still receive its vital energy, fluorescent mushrooms or irradiating crystals receiving that energy could illuminate the otherless dark corridor of lower levels. With the discrete variation of the activity of the azure sun, anybody wandering in lesser level would be able to tell the time at first glance. What do you think of it?
Last, a little remark about the azure sun: it doesn\'t move in sky, right? So shadows would always have the same shape in Yliakum. Excepted if the azure sun is always on zenith: there should be almost no shadows at all.
Hoping to get some positive response,
Shasckaw