Here is a Houdini Tool to create Lego meshes ! Check out the Game prototype over here : https://www.artstation.com/artwork/dKXJyx
LEGO City fully made from the Houdini Lego Tool
Simple meshes used to make the Lego version
The tool is fully procedural and allows to export 4 different LODs
The different Brick meshes used to build the meshes
Comparison of the initial mesh, mesh calculated by Houdini and the mesh integrated in UE5
Showcase of the integration of the Lego Meshes
Houdini Graph
Final result : LEGO City Game Prototype