anchor.diff:  
   [TIP]
   ====
  -It can happen that you load textures at different scales, for example, your blades of grass may look as big as twigs, or your spaceship's heat tiles may look like small bathroom tiles. Then you need to adjust the texture scale, either bigger (< 1.0f) or smaller (< 1.0f). 
  +It can happen that you load textures at different scales, for example, your blades of grass may look as big as twigs, or your spaceship's heat tiles may look like small bathroom tiles. Then you need to adjust the texture scale, either bigger (> 1.0f) or smaller (< 1.0f). 
   
   [source,java]
   ----
  
positive.code: viewPort.addProcessor(fpp);
  ----
  
  .  Specify a `Glow` color. +A ColorRGBA value of your choice, e.g. choose a warm or cold color for different effects, or white for a neutral glow.
  [source,java]
  ----
  mat.setColor("GlowColor",ColorRGBA.White);
  ----
  
  .  (Optional) Specify a `GlowMap` texture. +This texture outlines in detail where the DiffuseMap texture glows. If you don't supply a GlowMap, the whole material glows everwhere.  
  [source,java]
  ----
  mat.setTexture("GlowMap", assetManager.loadTexture("Textures/alien_glow.png"));
  
negative.code: 
  
  .  (Optional) Specify other material settings.
  
  [cols="3", options="header"]
  |===
  
  