# How can I allow building on top of a custom cube in UEFN? **URL:** \ **Category:** World Creation\ **Tags:** fortnite-creative, unreal-editor-for-fortnite, question, fortnite\ **Created:** [April 9, 2025, 11:31pm UTC](https://forums.unrealengine.com/t/how-can-i-allow-building-on-top-of-a-custom-cube-in-uefn/2448817 "2025-04-09T23:31:42Z")\ **Posts on this page:** 1\ **Showing post:** 12
**Author:** ![rise1](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/rise1/32/1050690_2.png) [@rise1](https://forums.unrealengine.com/u/rise1)\ **Post date:** [April 14, 2025, 11:14pm UTC](https://forums.unrealengine.com/t/how-can-i-allow-building-on-top-of-a-custom-cube-in-uefn/2448817/12 "2025-04-14T23:14:24Z")
Hello again, I still haven’t been able to get it working. I’ll post the images below showing the steps I followed, so you can check if there’s anything wrong with the setup. Blueprint Creation (BuildingProp) ![fig1](https://d3kjluh73b9h9o.cloudfront.net/original/4X/1/6/3/163d5a75f7c06ccb78fa84e1c2c06dd276c909a4.png) I also tried with the “Forcibly Structurally Supported” option enabled. ![fig2](https://d3kjluh73b9h9o.cloudfront.net/original/4X/b/d/0/bd06597c8348f71a61d1e83f5b99f813bc21d93c.png) Tried with and without the “Do Not Block Buildings” option under Building, and also tested other Building Types. ![fig3](https://d3kjluh73b9h9o.cloudfront.net/original/4X/8/5/b/85b5a801a506461a77812a77d1fa74d0074012a6.png) Also changed: Collision \> Collision Presets to BlockAll. ![fig4](https://d3kjluh73b9h9o.cloudfront.net/original/4X/8/1/3/8135b310bad721fc36ced354c9b32eb41016916a.png) If anyone has a file with just a single cube that allows building on top and can share it for download, I’d really appreciate it. It would help me analyze and understand what I might be doing wrong. --- _[View the full topic](https://forums.unrealengine.com/t/how-can-i-allow-building-on-top-of-a-custom-cube-in-uefn/2448817)._