Atomic Heart Mods and Tweaks Roundup – Inject HDR, Force DLAA, Increase FoV, and Improve Quality of Life

wccftech.com:

Atomic Heart on PC has great performance out of the box, and that is incredibly refreshing given the sad state of certain ports released in the past months. However, that doesn't mean there are no improvements to be made to the game.

As mentioned in the review, the game does not support High Dynamic Range (HDR) displays, and Windows 10/11's AI-based algorithm AutoHDR doesn't work with it either. That's doubtlessly a shame for everyone equipped with a display that can get much brighter than allowed by the Standard Dynamic Range (SDR).

There are two ways to attempt HDR injection into Atomic Heart. You could add the following Unreal Engine 4 parameters to the Engine.ini file:

r.AllowHDR=1r.HDR.EnableHDROutput=1r.HDR.Display.OutputDevice=3r.HDR.Display.ColorGamut=2

The last two parameters can be tweaked as described in the Unreal Engine 4's document, so you can freely experiment with that. It is unlikely that the result will be satisfactory, though, as forcing HDR through the UE parameters tends to provide an oversaturated image.

The other (and superior) HDR injection option requires using SpecialK, a tool created by Kaldaien to improve PC games in various ways. SpecialK was originally made to fix issues and add features to games like NieR: Automata, Dragon Quest XI, NieR Replicant, and Monster Hunter: World. However, since 2018 SpecialK was also updated to 'retrofit' HDR support for games that do not include an official implementation.

With Atomic Heart, an extra step is required. Before launching SpecialK, you'll have to replace the default sl.interposer.dll file with the one pinned by Kaldaien in SpecialK's Discord channel (specifically, in the Lobby\special-k subchannel). At this point, launch the game through SpecialK and