You have probably noticed it yourself but its never actually pitch black in minecraft. Even if you are in a cave with no torches you will still be able to see something independent of your gamma setting. Hardcore Darkness Mod 1.11, 1.10.2, 1.9.4 changes this, it removes the minimum block & sky light so if there is no light source its actually dark.

Download Hardcore Darkness Mod 1.11, 1.10.2, 1.9.4

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