DirectX vs OpenGL

Updated Version of my Guide on how to understand if the Normal Map has proper setup for your Software.
To swap between DirectX and OpenGL just flip Green Channel.
DirectX has an effect like details are Engraved which is used for software like Unreal Engine, Substance Painter, 3DS Max, Corona, CryEngine.
OpenGL has an opposite effect where all the details are Extruded which is used for Blender, Marmoset, Unity, Houdini, Cinema 4D, Arnold, Maya, Octane, Redshift, Vray, Zbrush.