Invisible wall outside the interior

hi guys,

https://www.ikea.com/addon-app/storageone/pax/web/latest/?range=pax&uiPlatform=web&locale=de-DE#/planner

I try to do like the link above. When I navigate, the wall becomes invisible if it covers the interior, and when I move to the other side the wall becomes visible again. I don’t know how to do this in unreal engine.

Any help or suggestions on how to get this effect would be greatly appreciated. sorry for my bad english. Thank you!