This article assumes that you have already followed the Building the Engine from Source Code guide that walks you through the process of setting up your local CRYENGINE build via the source code from the CRYENGINE GitHub repository, as well as having created a project using the same version of the engine.
Associating a Project with a Custom Engine
To start, we'll need to navigate to the directory in which our .cryproject file resides. Once you've done that you should see something similar to the screenshot below:
The first step to associate this project with our custom Engine is to right-click the project file and select Switch Engine Version. This should bring up the window below:
From here you should see the name of the custom engine that we registered in the previous guide in the Drop-Down menu.
Enabling Engine Compilation for a Project
Once a project is associated with the engine we want to build, right-click your .cryproject file and select Open CMake GUI from the menu:
This will open up the CMake GUI with our project selected. Once opened, tick OPTION_ENGINE to enable the engine to be built:
Then press Generate to re-generate your solution. We can then click Open Project to open the project in Visual Studio, giving us one solution with both engine and game project inside: