How to Change a Project to use the Engine Source Code

It is sometimes desirable to change an existing Unreal Engine project to use the engine source code to:

• gain access to more build configurations, such as debug versions of engine code
• to customize the engine code

To make the change you need to:

• download a version of the engine code, following the instructions in BuildFromSource.html to select a branch and build it
• register your source build so that it appears as an option when you right-click a .uproject file. To do this use Explorer to locate and execute this file under your source build directory:

.\Engine\Binaries\Win64\UnrealVersionSelector-Win64-Shipping.exe

• right-click you game project .uproject file and select the source build engine:

• changing to the source build will automatically regenerate the .sln file