Cannot fix collisions

[EmmanouilKoreta]

1. I created the walls of a house with blender archipack, but when I export the fbx and import it to unreal engine it have these collisions. I want to be able to walk through the house but I cant fix it. I tried removing the collisions and adding them again but this is the only way the collisions appear. Any solutions?

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[Everynone]

Simple collision will not work well enough here, it’s just an approximation. Remove the simple one:

And set it to be complex instead:

[EmmanouilKoreta]

You are awesome! Thank you for your quick response!!!