anchor.diff:  
   In practice it's a bit more than that.A shader node is declined in several parts :
   
  -*  A shader node definition, defining : 
  +*  A shader node definition, defining :
   **  The type of shader node (Vertex or Fragment for now)
   **  The minimal glsl version needed for the shader node
   **  The path to the shader file (containing the shader code heh)
  
positive.code: This Material definition has one Default technique with 2 node declarations. +
  *+++<u>CommonVert Definition</u>+++* +
  CommonVert is a vertex shader node that has commonly used input and outputs of a vertex shader. It also computes the position of the vertex in projection space. +
  Here is the definition content (Common/MatDefs/ShaderNodes/Common/CommonVert.j3sn) : 
  
  [source,java]
  ----
  
negative.code: 
  [TIP]
  ====
  As mentioned before Global position is initialized with the attribute inPosition, so this is equivalent to :
  
  [source, java]
  ----
  