A video rundown showing the process of creating an environment with the House Gen HDA inside Unreal.
A custom parameter editor for Houdini Engine was also created for this project to facilitate.
What you see is entirely procedural, all controls could reach higher levels, indeed. More customization would be possible.
Props, beams, shingles and a few other elements are isntances, and others Ive set as nanite. But could all be nanite as well.