, or if it is created and its position is inside the
	worldcell's volume or it enters a <a href="transition.html">transition
	volume</a> leading from one worldcell to another.
</p>

<p>
	All worldcell data files are located in the <code>/data/worldcells/</code>
	directory. The file extension is <code>.cell</code>.
</p>

<h2>
	Key concepts
</h2>

<hr/>

<h4>
	Interior
</h4>

<p>
	Worldcell volumes are not supposed to overlap. The only exception are 
	interior and exterior worldcells. If an entity's position 