the Map is 2D and valid only at a specific angle in space
when you rotate your model you are still using the same map
but faces angle changes but this does not re calculate the real spec reflection on the model function of light sources ect…
and this is valid for all maps
UV map will always be an approximation
not the real physical things in 3D
see description of spec
has to be function of cam angle face’s angle and light source angle in 3d space!
happy bl