Grammar-driven procedural buildings

A pipeline in two parts. A facade parser based on classical computer vision extracts the structure of real facades. A grammar-based generator then builds houses from OpenStreetMap footprints and those rules, and emits instanced geometry that Unreal Engine can render at city scale.

The generator started as a Python tool for Blender and is now a C++ plugin for Unreal Engine that follows the same principles. A paper on the pipeline is in preparation.