Summary
When you add a mesh to the Scene Graph in UEFN and enable Queryable = true, players lose the ability to edit any building pieces placed inside of that mesh, the edit option does show up but displays “unable to edit building.” The building system works completely fine inside the mesh if you either place it directly in the level or set Queryable = false on the Scene Graph mesh, so the issue is clearly tied to the Scene Graph + Queryable combination.
The problem is that Queryable is required for EntityEnteredEvent and EntityExitedEvent to fire, so disabling it isn’t really a solution, it just trades one broken thing for another. You either have your overlap events working and lose building editing inside the mesh, or you disable Queryable and get building editing back but lose the events entirely.
Since this doesn’t happen at all with directly placed meshes, it really seems like a bug specific to Scene Graph meshes with Queryable enabled rather than intended behavior.
Please select what you are reporting on:
Unreal Editor for Fortnite
What Type of Bug are you experiencing?
Scene Graph
Steps to Reproduce
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Take any static mesh (e.g. a cube) and set its collision preset to FortTriggerOnlyPawns (other presets also trigger the issue but this one is preferred for testing).
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Create a prefab and add the cube as a mesh component inside the Scene Graph.
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Collidable can be left on or off, the issue occurs either way (but for testing set it to off).
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Place the prefab in the level and scale it up large enough to build inside it.
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Launch a session (doesn’t matter if the game has started or not).
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Go inside the mesh, build any piece (cone, floor, wall, stair, etc.) and try to edit it while holding a pickaxe, gun, or any other item.
Expected Result
Players should be able to edit building pieces inside the mesh while holding any item (pickaxe, gun, etc.) the same way they can outside of it. The edit should work without having to switch into build mode, since that is normal behavior everywhere else in the game. The “unable to edit building” message should not appear, and the experience inside the mesh should be no different from editing buildings in any other area of the level.
Observed Result
The edit prompt appears but shows “unable to edit building”
Platform(s)
All
Additional Notes
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The issue only occurs with mesh components added through the Scene Graph inside a prefab, not with meshes placed directly in the level.
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Collidable being enabled or disabled makes no difference, the issue persists either way.
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The only setting that affects the issue is Queryable, disabling it fixes building editing but disables EntityEnteredEvent and EntityExitedEvent, making it not a viable solution.
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Any collision preset on the mesh triggers the issue, FortTriggerOnlyPawns is just recommended for testing purposes.
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The problem is not build mode specific, editing works fine in build mode, the issue only appears when trying to edit while holding any other item.