This mod adds HDR support to Subnautica 2. Read the instructions below to know how to use the mod.

Installation Instructions

1. Requirements:

UE4SS (Standard for Subnautica 2 modding).
SN2ModSettings (Required for the in-game menu). You need the latest version.

2. The Engine.ini Tweak:
Unreal Engine 5 will not allow HDR to turn on unless it is enabled at boot.

Go to %localappdata%\Subnautica2\Saved\Config\Windows\
Open Engine.ini (create it if it doesn't exist).
Add these lines to the bottom:
[SystemSettings] r.AllowHDR=1
Important: Right-click Engine.ini -> Properties -> Check Read-Only -> Apply. (The game will delete this line on launch if you don't set it to Read-Only).

3. Mod Install:

Extract the mod folder into Subnautica2\Binaries\Win64\Mods\.
Ensure enabled.txt is inside the mod folder.

Also Important:

When installing the mod for the first time with everything and opening the game, the mod tab won't have the HDR mod in there. That is totally normal! That happens because the SN2ModSettings mod needs to register the HDR mod first. When you then relaunch the game the HDR Toggles should appear.

I would also recommend you always removing the registrations and saved files from these paths when installing a new version of the mod to prevent conflicts.

Saved path: D:\Steam\steamapps\common\Subnautica2\Subnautica2\Binaries\Win64\ue4ss\Mods\SN2ModSettings\saved
Registrations Path: D:\Steam\steamapps\common\Subnautica2\Subnautica2\Binaries\Win64\ue4ss\Mods\SN2ModSettings\registrations

The file name is Subnautica2HDR.lua in both folders.

Important things to know

Make sure HDR is turned on on your device. Otherwise it will look wrong
You will have to reenable the toggle everytime you start the game.

If you have any issues let me know in the comments.

HDR Support