This post is coming a bit late but here are both articles we got on 80 LVL about our tool :
https://80.lv/articles/houdini-based-building-tool-for-unreal
https://80.lv/articles/procedural-buildings-in-ue4-logic-behind-the-tool
Note that the final version of the tool for UE4 is now available on the marketplace :
https://artstn.co/m/oxAD
Released Tool In Action