Quote Originally Posted by The_Mark
We're representing the fact that the Earth is actually hollow. The inner Earth (Agharta) accommodates a base of operations of an advanced alien race (Bartixians). You can see Agharta through the hole opened up for Bartixian spaceships, as the buggers tend to zoom in and out of it once in a while through the crust itself, instead of using the large polar holes.



In other words, it's a feature.
1 The Bartixan's are not alien there a stick race from lost bartix
2 The Alien are MOONIE MEN
3 The Bartixan stick man Model has no bugs