Compiling Unreal Engine from Source (UE4/UE5)

1. Download the source code
2. If what you downloaded is a compressed archive, decompress it first, then run Setup.bat (on Windows) This step downloads and installs a great many dependencies, and the script supports multithreaded downloading, so using multithreaded downloading is recommended. Run the command from a console, for example:

   setup.bat --threads=20
   

3. Run GenerateProjectFiles.bat to generate the project files
4. Double-click UE4.sln (UE5.sln) to open the project with Visual Studio
5. (Important) Set the solution configuration to Development Editor and the solution platform to Win64
6. Right-click the UE4 (UE5) target and select 生成

The compilation method is the same for UE4 and UE5.