Quote - Well, not exactly. You need to un-gamma correct all the incoming material first - texture maps, colors entered in the material room, etc. If you don't, you can't actually get accurate lighting, because you're starting with wrong numbers.

This is fine, but you will still need to turn off the automatic 2.2 gamma correction checkmark in the render options. If this disables gamma compensation of textures then you can do it manually with a node per texture file.

What you do not want in any case is baking a gamma curve into your render, then removing it in post and then applying it again. That will ruin your render.