Simon Verstraete and SideFX released a new tutorial for Houdini users. 

The tutorial will explain to you how to create a procedural Level Builder that uses a single curve to create the walls, ceiling, and floor along with doors and props. You will learn how to combine panels, crates and tanks into a single tool and generate a complete level inside Unity. In the end, you can use the Houdini Engine for Unity plug-in to use the tool for your project.

You will start by organizing the system that lays out corridors using a grid and then, step by step, build a fully functional system.

Learn more here.