Reopening project is blank

Newb here just reopened my first UE Cesium project from last week and map is blank but the cesium objects are in the outliner. Is there a particular workflow for when reopening a project? Thanks!

Getting crash with this error trying to reload tiles and get the map back:

Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0x00000000000002d0

UnrealEditor_CesiumRuntime!Cesium3DTilesSelection::Tileset::getRootTile()
UnrealEditor_CesiumRuntime!ACesium3DTileset::OnFocusEditorViewportOnThis() [D:\build\U5M-Marketplace\Sync\LocalBuilds\PluginTemp\HostProject\Plugins\CesiumForUnreal\Source\CesiumRuntime\Private\Cesium3DTileset.cpp:465]
UnrealEditor_CesiumRuntime!TBaseFunctorDelegateInstance<void __cdecl(TArray<AActor *,TSizedDefaultAllocator<32> > const &),FDefaultDelegateUserPolicy,<lambda_10ad80d509c5a18dbede9a84fa0362ab> >::ExecuteIfSafe() [D:\RocketSync\5.1.0-23058290+++UE5+Release-5.1\Working\Engine\Source\Runtime\Core\Public\Delegates\DelegateInstancesImpl.h:848]
UnrealEditor_UnrealEd
UnrealEditor_UnrealEd
UnrealEditor_SceneOutliner
UnrealEditor_SceneOutliner
UnrealEditor_SceneOutliner
UnrealEditor_SceneOutliner
UnrealEditor_SceneOutliner
UnrealEditor_SceneOutliner
UnrealEditor_SceneOutliner
UnrealEditor_Slate
UnrealEditor_Slate
UnrealEditor_Slate

Another strange issue, still blank/no terrain but when I hit play on the viewport it started generating SOME terrain but then disappears when I stop the simulation. What is going on? I need to get some work done…

Hi @Matte_P,

Are you trying to run the app in “Simulation” mode? Cesium 3D Tiles don’t load properly when that mode is checked.

That’s my first guess, but if that’s not the cause, can you give us more details about your project – e.g. what version of Cesium for Unity you’re using and if you upgraded recently.

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There was a little button next to my scalability settings that read ‘Realtime: off’ and so I clicked that and the terrain just appeared. I don’t recall ever seeing that setting before let alone changing it. And after I switched it to ‘on’ then that option just disappeared completely.

Any ideas where that option came from and where it went?

Unreal switches into a non-realtime mode whenever you use it from a remote desktop connection of some sort. And it may even persist after you stop using remote desktop, until you explicitly re-enable realtime.

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What a little golden nugget of information… thanks for that Kevin. I looked around a bit and never did see the answer to that one. Great to know and that totally makes sense. Cheers to you and your team!