title: Blender + SceneKit (how-to)
body: <p>A few questions to game developers. I am very beginner in this. I want to create a game level for example a green plane with trees. I have played a little in Blender and SceneKit. I know that I can export <code>.dae</code> from Blender and import it to Xcode. My questions:</p>
  
  <ol>
  <li>Should I delete camera and light node before export? Why?</li>
  <li>Should I design all level in one <code>.dea</code> file or make it separately? For example one <code>.dea</code> for plane and four different trees in for <code>.dea's</code> How to merge them in Xcode?</li>
  <li>Can I use many times one <code>.dea</code> to generate for example a forest? How?</li>
  <li>If creating design in separately is better way how to keep proportions between them to protect yourself from creation man bigger than tree?</li>
  </ol>
  
  <p>I will be very great full if somebody someone dedicates to these questions. It will cut my time to learn basic. Thanks in advance. :)</p>