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Assets/Plugins/Native/BackroomsNoise/README.md

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+# BackroomsNoise C++ Plugin
+
+This native plugin provides high-performance noise generation for the Backrooms map system using **FastNoiseLite**.
+
+## Files
+- `BackroomsNoise.cpp`: C wrapper for Unity P/Invoke.
+- `FastNoiseLite.h`: The noise library (ensure you have the full version from [GitHub](https://github.com/Auburn/FastNoiseLite)).
+
+## How to Build (Windows MSVC)
+
+1. Open **Developer Command Prompt for VS**.
+2. Navigate to this directory.
+3. Run:
+   ```cmd
+   cl /LD /O2 /EHsc BackroomsNoise.cpp /Fe:BackroomsNoise.dll
+   ```
+4. Copy `BackroomsNoise.dll` to the `Assets/Plugins/` folder in Unity.
+
+## How to Build (Cross-platform with CMake)
+
+1. Create a `CMakeLists.txt`:
+   ```cmake
+   cmake_minimum_required(VERSION 3.10)
+   project(BackroomsNoise)
+   add_library(BackroomsNoise SHARED BackroomsNoise.cpp)
+   ```
+2. Build as usual.
+
+## Usage in Unity
+The `NativeNoiseProvider.cs` script will automatically attempt to load `BackroomsNoise.dll`. If it fails, it will fall back to Unity's built-in `Mathf.PerlinNoise`.

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