The Layers view mode will present all normal maps in object space format, yet your final result is still rendered using your tangent space maps. We feel this is the best way to visually present normal maps in 3D. Displaying tangent space maps in 3D has various shortcomings; the most obvious problem is you would frequently notice what appears to be UV seams or other errors across the map, which are not errors but required information to show a seamless end result. Additionally, object space normal maps allow us to rotate the normals when you rotate the lighting, which is cool.