This video accompanies an Unreal Engine 4.26 tutorial and sample project (http://www.gradientspace.com/tutorial...) that demonstrate how to use the Interactive Tools Framework and the Mesh Modeling Toolset (experimental plugins in UE4.26) to create a small at-runtime/in-game 3D modeling system.
This demo app includes basic polymodeling, mesh booleans, remeshing, and 3D sculpting.