UEC++ From Basics to Advanced | M01-004: Compiling Source Engine from GitHub
This video covers compiling Unreal Engine from source code via GitHub. Prerequisites include an Epic Games account linked to GitHub with source code access granted. Two download methods are explained: Git Clone (for ongoing updates) and Download ZIP (for one-time setup).
We walk through the complete compilation pipeline: running Setup.bat with multi-threaded downloading enabled, executing GenerateProjectFiles.bat to create the VS solution, opening UE5.sln in Visual Studio, selecting the DebugGame Editor configuration, and building the project — a process that takes 1-3 hours handling approximately 6700 individual projects.
Critical UBT tuning includes limiting MaxProcessorCount and MemoryPerAction to prevent stack overflow on memory-constrained systems (less than 32 GB RAM). The source engine consumes approximately 240-300 GB of disk space and enables deep engine customization, dedicated server packaging, and standalone program development.