anchor.diff:  
   
   .  Create a material based on the `Lighting.j3md` default material.
  ++
   [source,java]
   ----
   
  
positive.code: .  Load the texture `cube2Tex` into the `ColorMap` layer of the material `cube2Mat`.
  .  Apply the material to the cube, and attach the cube to the rootnode.
  
  *Tip:* Learn more about creating PNG images with an alpha layer in the help system of your graphic editor.
  
  
  == Shininess and Bumpiness
  
negative.code: 
  .  In the code sample, comment out the eight lines that have `sphereMat` in them.
  .  Below this line, add the following line: 
  +
  [source,java]
  ----
  sphereGeo.setMaterial((Material) assetManager.loadMaterial( 
  