title: SceneKit avoid lighting on specific node
body: <p>In SceneKit I'm building a node made of lines to draw the XYZ axes at the center of the scene, like in Cinema4D. </p>
  
  <p><a href="https://i.stack.imgur.com/UQFlS.png" rel="noreferrer"><img src="https://i.stack.imgur.com/UQFlS.png" alt="cinema4D"></a></p>
  
  <p>I would like these 3 nodes not to participate to the global lighting and be viewable even if the light is dark / inexistent / too strong. In the picture below you can see that the Z axis appears too heavily lighten and can't be seen.</p>
  
  <p><a href="https://i.stack.imgur.com/yCWfG.png" rel="noreferrer"><img src="https://i.stack.imgur.com/yCWfG.png" alt="my software"></a></p>
  
  <p>Is there a way to stop a node participating to the scene's lighting, like with category masks for physics? </p>
  
  <p>In this case, how would the node be lighten in order for it to appear anyway? </p>