I created a pre-vis version of the 'Yggdrasil Treeship' today in Maya. The reason behind doing this is to bring all the components together and to make it take shape. I've used what I've learnt about the ship from the resources I have gathered to formulate the shape and colouring.
The ring around the base houses the alien 'Erg's in the containers. The ring would rotate allowing the ship to travel in all directions as the aliens emit the fields that allows movement. The rings around the tree house the domes along with the Hawking Drive along the base of the structure. The base of the structure will undergo changes to accomidate how the mechanics would work.