I found in the web filter forge, a program for computing Normal Maps.
But where do I insert a normal Map in Maya?
Is there a specific Material for that input channel?
I road an article in the Anno 1701 community, that normal Maps are used to save Polygons! They said that they render a poly cube to a sphere through the normal Map!
It gives much more Detail with the Map.
A bump or Displacement Map don´t realize that!
( In the Tex area nobody replyed )