title: adding 3d model on SCNView
body: <p>I've started to build a super-puper game :) using SceneKit and there is one thing I can't decide.</p>
  
  <p>So ... I used third party tools to create a 3d model and then export it in .dae file, after that I add .dae file on SCNView.</p>
  
  <p>For example lets say I need to add 2 3d models on SCNView. As I see there are two ways to add 3d models from .dae file on SCNView:</p>
  
  <p>1 - create one .dae file with two models in it and then add one scene on SCNView</p>
  
  <p>2 - export each 3d model in separate .dae file and the add two .dae files on SCNView</p>
  
  <p>I think that both ways are working good but I want to know if there is best practices to add several 3d models from .dae file on SCNView.</p>