// #include "res://addons/rokojori_action_library/Runtime/Shading/Library/Normals.gdshaderinc"

vec3 scaleNormalMap( vec3 normal, float scale )
{ 
  normal -= vec3( 0.5 );
  normal *= scale;
  normal += vec3( 0.5 );

  return normal;
}

vec3 addNormalMaps( vec3 a, vec3 b )
{ 
  a -= vec3( 0.5 );
  b -= vec3( 0.5 );

  vec3 result = a + b;

  return result + 0.5;
}