title: Why is my art displayed at 2x on screen?
body: <p>I am creating a Universal App.</p>
  
  <p>I have created my art in illustrator to fit properly on an iPhone screen, specifically at 640x1136 px. I exported PNGs and named myArt@2x.png and also a 50% version named myArt.png. The art is in an atlas folder.</p>
  
  <p>I am creating sprite nodes a like this:</p>
  
  <pre><code>NSString * backgroundName=@"starField";
  SKSpriteNode *background = [SKSpriteNode spriteNodeWithImageNamed:backgroundName];
  background.position = CGPointMake(screenWidth/2, screenHeight/2);
  background.zPosition = LayerBackground;
  [_worldNode addChild:background];
  </code></pre>
  
  <p>The problem is that when I run this in the simulator (iPhone 4 w/retina), the images are scaled up. I have to ousel xScale and yScale to bring it back to actual size.</p>
  
  <p>Why? What am I doing wrong?</p>
  
  <p>Thanks,
  rich!</p>