Linear or Gamma color space?

I have read Linear Color space is recommended for a more realistic environment… but after downloading the lighting tutorial from assets store (for free) and switched between linear and gamma space color option, i´m questioning what are the cases to use linear and gamma, looks like linear is better for inner environments like rooms… and gamma for outer ones…

which one do you think looks more realistic ?

Linear is always more realistic, though gamma can sometimes produce more pleasing results more easily. For outdoor scenes if gamma is looking better, it’s probably because you need to increase the brightness of your light to compensate for the differences between the color spaces.

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