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.

This fork aims to maintain the mod, resolve existing issues, add new functionality and, eventually, port the mod to new platforms.

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

Installation instructions

Download the latest d3d11 x86 release of Ultimate ASI Loader from here: https://github.com/ThirteenAG/Ultimate-ASI-Loader/releases/download/Win32-latest/d3d11-Win32.zip

Extract the following files from the AliasIsolation.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 copy 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.

Runtime settings

To disable the mod at runtime, hit Ctrl+Delete. To re-enable it, hit Ctrl+Insert.

Known issues

• No support for the unofficial Rift mode (could change in the future).
• RenderDoc, Epic Games Overlay, Windows Auto HDR, or any other software which also uses API hooking may break the rendering.
• SLI/CrossFire performance will probably be badly impacted, and depending on what the driver does, might also suffer from glitchy rendering.
• Some special effects can appear thinner or exhibit ghosting. Sparks are known to be eroded.
• While the motion tracker is in use, the Depth of Field shader seems to cause the tracker's LED highlights to appear, along the top of the screen.
• (Under investigation) The Epic Games Store release of the game crashes with a fatal error at "aliasIsolation_hookableOverlayRender".
• You are unable to move the mouse in the Alias Isolation UI while the game is unpaused. You can use the arrow keys to change settings in the menu, or pause the game which will unfreeze the mouse and allow you to adjust the settings.
• (Planned) No support for the integrated Cinematic Tools.
• Some UI backgrounds may become red in colour, which could be an issue with the original shaders.

Building from source

You need to have Visual Studio 2022. Community Edition works fine.

Download Boost 1.81 and extract it into src/external/boost. For example, you should have config.hpp in src/external/boost/boost.

If you want to just build the binaries, but don't care about Visual Studio solution files:

• (Release mode) Just run compile.cmd. The output will be in the folder t2-output/win32-msvc-release-default.
• (Debug mode) Just run compile_debug.cmd. The output will be in the foldert2-output/win32-msvc-debug-default.

If you want to build a release (i.e. have it save the binaries and put all the files needed to run the mod in a single folder):

• (Release mode) Just run release.cmd. The output will be in the folder release.
• (Debug mode) Just run release_debug.cmd. The output will be in the folder debug.

If you'd like to open the project in Visual Studio, run sln-vs2022.cmd, and then open t2-output/aliasIsolation.sln.