UE4SS for VEIN

Pre-configured UE4SS build for VEIN (UE 5.6.1), with stability patches and game-specific signatures.

• RE-UE4SS by Narknon and the UE4SS-RE team — The original UE4SS framework.
• xMathayus — VEIN-compatible UE4SS fork (RE-UE4SS-vein-3.0.1-940) that this build is based on.
• Alustrial — VEIN-specific signatures, mappings, and DLL stability patches.

This build includes stability patches that prevent common crashes when scripting against VEIN:

• Null pointer safety — 16+ null checks added across the Lua ↔ UObject bridge, converting hard crashes into catchable Lua errors
• TextProperty string support — Lua strings can now be assigned directly to FText properties (e.g., object.DisplayName = "My Item")
• TArray safety — Null checks on array operations (ForEach, GetArrayNum, index access) prevent crashes on invalid arrays
• SEH note — VEIN's UE4SS build has SEH (Structured Exception Handling) disabled. Without these patches, any null pointer dereference in the Lua bridge is a guaranteed hard crash.

1. Navigate to your VEIN install directory:

   <Steam>/steamapps/common/Vein/Vein/Binaries/Win64/
   

2. If a ue4ss folder already exists, back it up.

3. Copy the entire contents of this release into Win64/ue4ss/:

   Win64/
     ue4ss/
       UE4SS.dll
       UE4SS-settings.ini
       MemberVariableLayout.ini
       VTableLayout.ini
       Vein-5.6.1-0+UE5-01e0a584.usmap
       UE4SS_Signatures/
         StaticConstructObject.lua
         FText_Constructor.lua
       Mods/
         mods.txt
         mods.json
         ...
   

4. You also need the UE4SS proxy DLL. Place dwmapi.dll in the Win64/ directory (same folder as Vein-Win64-Test.exe). If you don't have it, grab it from the official UE4SS releases.

5. Launch the game. The UE4SS console window should appear.

The included UE4SS-settings.ini is pre-configured for VEIN:

• Engine version: 5.6
• GUI console: enabled
• All hooks: enabled
• Hot reload: disabled by default (set EnableHotReloadSystem = 1 to enable Ctrl+R reload)

Create a new folder in Mods/ with a Scripts/main.lua:

Mods/
  MyMod/
    Scripts/
      main.lua
    enabled.txt       <-- empty file, enables the mod

Enable it by adding to mods.txt:

MyMod : 1

ExecuteInGameThread(function()
    local mgr = FindFirstOf("VeinAssetManager")
    local recipes = mgr:GetAllRecipes(false)

    for i = 1, #recipes do
        local recipe = recipes[i]:get()
        if recipe:IsValid() and recipe:GetFName():ToString() == "CR_Kindling" then
            recipe.CraftTime = 1.0  -- was 6.0
            print("Kindling craft time set to 1 second!")
            break
        end
    end
end)

Tested with VEIN build as of June 2026 (UE 5.6.1). Signatures and mappings may need updating after game patches.

UE4SS is licensed under MIT. See LICENSE for details.