title: Will nodes from different layers interact
body: <p>I have added various layers to a GameScene (GS) (i.e. HUD, scores layers). I have also added a layer to hold and manage projectiles spawned from a Player entity (main layer). </p>
  
  <p>Problem is although I have set collision and category bitmasks for all nodes in all layers the projectile does not interact with any nodes in the main layer of the GS.</p>
  
  <p>So question is will nodes interact with each other if they are contained within different layers of a GS?</p>
  
  <p>Thanks in advance </p>
  
  <p>PS All nodes are Entities with sprite and physics components </p>