title: ARKIT - how many tracking images can it track?
body: <p>So I understand that in order to track images, we need to create a AR Resource Folder and place all the images we intend to track there, as well as configuring thru the inspector their real world size properties.</p>
  
  <p>Then we set the array of ARReferenceImages to the Session's World Config.</p>
  
  <p>All good with that. 
  But HOW MANY can we track ? 10? 100? 1000000? and would it be possible to download those images and create ARReferences on the fly, instead of having them in the bundle from the very beginning ?</p>