Gamma correction is just what it implies. It is a correction factor that is being applied to an image. this does not mean that you will always need it. It will always be a conditional thing when editing an image.

However, when it comes to a render engine, that can be a different story. With things like, tranparency, bump, and displacement maps, you can adjust where zero falls in the range with it.

There is the argument that certain render engines are setup specifically for certain gamma settings to be used, but that also assumes that everthing is setup to use it as well. That would mean that all the lights, shaders, textures, render settings, etc; are set up for it.

And as most of us already know, there is plenty of debate on what is the proper way of doing it.

Is one way better than the other when it comes to gamma correction?

That depends on who you ask, and what they want in the final output of the image.

 

 

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