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I was curious to know which normal map works better with Blender. Is it DirectX or OPenGL normal maps?

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    $\begingroup$ Blender expects normal maps in the OpenGL format. The difference between the two is that the green channel is inverted from one to the other, so in the end it doesn't matter what you use, if you know how to use it - you get the same result. $\endgroup$ – Jaroslav Jerryno Novotny Feb 3 '18 at 16:06
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Only DirectX applications use DX normal maps. And DirectX run only under Windows mainly due to license. For everything else you need to use OpenGL. For sure is good always check documentation.

On image below you can find simple way how to convert DX to OpenGL (or OpenGL to DX)

enter image description here

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