It's Redux version of game S.T.A.L.K.E.R .: Shadow of Chernobyl. The main objective of the project - improved graphics and add new gameplay features.
you can choose tonemapping style is settings. change will apply in real-time.
+links
default vs aces
Screenshotcomparison.com
default vs filmic
Screenshotcomparison.com
aces vs filmic
Screenshotcomparison.com
beautiful
I think Filmic looks best, its only a subtle difference
Filmic is definitely the best.