In case you missed it, during the recent Houdini HIVE event, held alongside this year's Game Developers Conference, CG Supervisor Ian Smith shared "Accelerating Workflow: Rapid Iteration with Houdini, ZBrush, and Substance", a detailed presentation that explained how these programs can be used together to set up an efficient workflow for creating environment art.
Following the presentation, the author also shared a neat pack containing three Houdini-made example files featured in the breakdown, as well as the supporting files, such as GoZ, FBX, and Displacement Map. According to the creator, the files were made with Houdini 19.5.303 and can be used for educational purposes only.