Overview

Alias Isolation is a mod for Alien: Isolation. It adds temporal anti-aliasing into the shipped game, and fixes a few small issues with the rendering.

The mod works by injecting itself into the executable, and hijacking D3D11 calls. It replaces a few shaders, and injects some of its own rendering.

Suggestions for new features or pull requests for this mod are welcome!

Installation instructions

Extract the following files from the AliasIsolation-<version>.7z archive, obtainable via the releases page, to the folder where Alien: Isolation is installed (you should be in a folder that has a file called AI.exe):

1. Extract the mods folder to your Alien: Isolation folder.
2. Extract aliasIsolation.asi and d3d11.dll to your Alien: Isolation folder.

Note

If you're using Linux and want to play the game via an older version of Proton (version < Proton 8), you might need to perform an extra step to let Proton know that you want it to use the ASI loader:

• Add this launch option to the game, in Steam: WINEDLLOVERRIDES="d3d11=n,b"

Video settings

These options must be set to the correct values for the mod to work properly.

Option	Value
Anti-aliasing	SMAA T1x
Chromatic Aberration	Disabled
Motion Blur	Enabled

Runtime settings

To disable the mod at runtime, hit Ctrl+Delete. To re-enable it, hit Ctrl+Insert. To show/hide the mod menu at runtime, hit DELETE.

Known issues

• No support for the MotherVR mod.
• RenderDoc, Windows Auto HDR, MSI Afterburner, Rivatuner, or any other software which also uses API hooking may break the rendering.
• Some particle effects can appear thinner or exhibit ghosting. Sparks and embers are known to be eroded.
• Signs with text can noticeably "fade in" when the player's camera is stationary.
• While the motion tracker is in use, the Depth of Field shader seems to cause the tracker's LED highlights to appear along the edges of the screen.
• The Epic Games Store release of the game may crash with a fatal error at aliasIsolation_hookableOverlayRender.

Building from source

1. Clone this repo using Git.
2. Install CMake, Visual Studio 2022 (Community edition is enough) and choose the C++ packages (including all the Clang support packages) in the installer.
3. Configure the project using CMake's GUI to use Visual Studio 2022, an x86 target (very important!) and ClangCL as the toolset parameter.
4. Modify tracy's CMakeLists.txt to force TRACY_ENABLE to OFF - your game will run out of memory from the performance profiler otherwise.
5. Go to the output directory you chose using CMake, open the solution (.sln) in Visual Studio and build for RelWithDebInfo.
6. The compiled shaders (.cso) will be in the output directory, collect these files to create the below structure (have a look at a recent release to see how they're packaged if needs be).

• mods
  • aliasIsolation
    • data
      • shaders
        • .cso files
      • textures
        • aliasIsolationLogo.png