====== The terrain normals map ======

The //terrain normals map// is a map of vectors perpendicular to the [[l3dt:reference:maps:hf|heightfield]] surface. This map is used only for generating the [[l3dt:reference:maps:lm|light map]]. 

===== Example map =====

{{ l3dt:reference:maps:tn.jpg }}

Here the three colours (//r//, //g//, //b//) are used to represent the three components of the normal vector (//x//, //y//, //z//).

===== Further reading =====

  * User-guide topics:
    * [[l3dt:userguide:ops:tn|Generating the normals map]].
    * [[l3dt:userguide:ops:lm|Generating the light map]].
  * Algorithm information:
    * [[l3dt:algorithms:lm#Calculating light intensity]].
    * [[l3dt:algorithms:lm#Bump-mapping]].