Cesium URL Template Raster Overlay appears to be unstable

[Reag]

It appears to be very easy to cause the Unity Editor to crash when using this component, especially if you have sparse coverage.

For example, during my initial testings, I used an Ellipsoid 3D Tileset with a URL Template Raster Overlay component attached to it. This component was pointed to my office's local debug server, containing Texture Tiles for a section of Europe. Immediately, issues began to occur.

First, editor memory consumption shot up from 2 gig to around 5 gig. Despite knowing the tiling scheme (Standard Web Mercator that works with other mapping solutions, such as Online Maps v3), the tiles appeared in the incorrect place. Finally, after inspecting the scene for around a minute, the Unity Editor hard crashed.

Partial Crash Log

=================================================================
	Managed Stacktrace:
=================================================================
	  at <unknown> <0xffffffff>
	  at CallbackFunctionNativeFunction:UnityEditor_CallbackFunction_InvokeCallback <0x000b8>
	  at CallbackFunctionNativeFunction:Invoke <0x00112>
	  at UnityEditor.EditorApplication:Internal_CallUpdateFunctions <0x00327>
	  at System.Object:runtime_invoke_void <0x00184>
=================================================================
Crash!!!

========== OUTPUTTING STACK TRACE ==================

0x00007FFD494A67DD (CesiumForUnityNative-Runtime) [C:\DEV\CesiumDevelopment\Packages\com.cesium.unity\native~\extern\cesium-native\CesiumRasterOverlays\src\RasterOverlayTile.cpp:54] CesiumRasterOverlays::RasterOverlayTile::~RasterOverlayTile 
0x00007FFD492C57DA (CesiumForUnityNative-Runtime) [C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.43.34808\include\vector:1805] std::vector<Cesium3DTilesSelection::RasterMappedTo3DTile,std::allocator<Cesium3DTilesSelection::RasterMappedTo3DTile> >::clear 
0x00007FFD492CA174 (CesiumForUnityNative-Runtime) [C:\DEV\CesiumDevelopment\Packages\com.cesium.unity\native~\extern\cesium-native\Cesium3DTilesSelection\src\TilesetContentManager.cpp:1253] Cesium3DTilesSelection::TilesetContentManager::unloadTileContent 
0x00007FFD492C9D61 (CesiumForUnityNative-Runtime) [C:\DEV\CesiumDevelopment\Packages\com.cesium.unity\native~\extern\cesium-native\Cesium3DTilesSelection\src\TilesetContentManager.cpp:1474] Cesium3DTilesSelection::TilesetContentManager::unloadCachedBytes 
0x00007FFD4929A67F (CesiumForUnityNative-Runtime) [C:\DEV\CesiumDevelopment\Packages\com.cesium.unity\native~\extern\cesium-native\Cesium3DTilesSelection\src\Tileset.cpp:463] Cesium3DTilesSelection::Tileset::loadTiles 
0x00007FFD484A017A (CesiumForUnityNative-Runtime) [C:\DEV\CesiumDevelopment\Packages\com.cesium.unity\native~\Runtime\src\Cesium3DTilesetImpl.cpp:142] CesiumForUnityNative::Cesium3DTilesetImpl::Update 
0x000002A0A7DBFCF9 (Mono JIT Code) (wrapper managed-to-native) Reinterop.ReinteropInitializer/CallbackFunctionNativeFunction:UnityEditor_CallbackFunction_InvokeCallback (intptr)
0x000002A0A7DBFBA3 (Mono JIT Code) [C:\DEV\LogicClient\src\OverSight_Unity\Library\PackageCache\com.cesium.unity\Runtime\generated\Reinterop.RoslynSourceGenerator\ReinteropInitializer.cs:22487] Reinterop.ReinteropInitializer/CallbackFunctionNativeFunction:Invoke () 
0x0000029FB33C5CC8 (Mono JIT Code) UnityEditor.EditorApplication:Internal_CallUpdateFunctions ()
0x0000029EDA958FC5 (Mono JIT Code) (wrapper runtime-invoke) object:runtime_invoke_void (object,intptr,intptr,intptr)
0x00007FFD680969CE (mono-2.0-bdwgc) [C:\build\output\Unity-Technologies\mono\mono\mini\mini-runtime.c:3445] mono_jit_runtime_invoke 
0x00007FFD67FD8474 (mono-2.0-bdwgc) [C:\build\output\Unity-Technologies\mono\mono\metadata\object.c:3068] do_runtime_invoke 
0x00007FFD67FD8560 (mono-2.0-bdwgc) [C:\build\output\Unity-Technologies\mono\mono\metadata\object.c:3115] mono_runtime_invoke 
0x00007FFCF404BA14 (Unity) scripting_method_invoke
0x00007FFCF40237A3 (Unity) ScriptingInvocation::Invoke
0x00007FFCF401EA65 (Unity) ScriptingInvocation::Invoke<void>
0x00007FFCF4192E0B (Unity) Scripting::UnityEditor::EditorApplicationProxy::Internal_CallUpdateFunctions
0x00007FFCF526A8C7 (Unity) SceneTracker::Update
0x00007FFCF4DB16FA (Unity) Application::TickTimer
0x00007FFCF53A63EA (Unity) MainMessageLoop
0x00007FFCF53AC0B4 (Unity) UnityMain
0x00007FF6B4352FBA (Unity) __scrt_common_main_seh
0x00007FFE33CEE8D7 (KERNEL32) BaseThreadInitThunk
0x00007FFE357F14FC (ntdll) RtlUserThreadStart

========== END OF STACKTRACE ===========

After this, I reloaded my test scene and attempted to disable the URL Template Raster Overlay component. The editor crashed once again.

Second Crash Log

=================================================================
	Managed Stacktrace:
=================================================================
	  at <unknown> <0xffffffff>
	  at CesiumForUnity.Cesium3DTileset:DotNet_CesiumForUnity_Cesium3DTileset_OnDisable <0x00160>
	  at CesiumForUnity.Cesium3DTileset:OnDisable <0x001fa>
	  at System.Object:runtime_invoke_void__this__ <0x00187>
	  at <unknown> <0xffffffff>
	  at UnityEditor.SerializedObject:ApplyModifiedProperties_Injected <0x000c1>
	  at UnityEditor.SerializedObject:ApplyModifiedProperties <0x0010a>
	  at UnityEditor.EditorGUI:DoInspectorTitlebar <0x0171a>
	  at UnityEditor.EditorGUI:InspectorTitlebar <0x002fa>
	  at UnityEditor.EditorGUILayout:InspectorTitlebar <0x0012a>
	  at UnityEditor.UIElements.EditorElement:DrawEditorSmallHeader <0x00342>
	  at UnityEditor.UIElements.EditorElement:DrawEditorHeader <0x001b2>
	  at UnityEditor.UIElements.EditorElement:HeaderOnGUI <0x00fda>`

========== OUTPUTTING STACK TRACE ==================

0x00007FFD49244323 (CesiumForUnityNative-Runtime) [C:\DEV\CesiumDevelopment\Packages\com.cesium.unity\native~\Runtime\src\TilesetMaterialProperties.cpp:150] CesiumForUnityNative::TilesetMaterialProperties::getOverlayTextureID 
0x00007FFD4927C564 (CesiumForUnityNative-Runtime) [C:\DEV\CesiumDevelopment\Packages\com.cesium.unity\native~\Runtime\src\UnityPrepareRendererResources.cpp:1936] CesiumForUnityNative::UnityPrepareRendererResources::detachRasterInMainThread 
0x00007FFD492D68A6 (CesiumForUnityNative-Runtime) [C:\DEV\CesiumDevelopment\Packages\com.cesium.unity\native~\extern\cesium-native\Cesium3DTilesSelection\src\RasterMappedTo3DTile.cpp:239] Cesium3DTilesSelection::RasterMappedTo3DTile::detachFromTile 
0x00007FFD492CA15F (CesiumForUnityNative-Runtime) [C:\DEV\CesiumDevelopment\Packages\com.cesium.unity\native~\extern\cesium-native\Cesium3DTilesSelection\src\TilesetContentManager.cpp:1251] Cesium3DTilesSelection::TilesetContentManager::unloadTileContent 
0x00007FFD492CA33D (CesiumForUnityNative-Runtime) [C:\DEV\CesiumDevelopment\Packages\com.cesium.unity\native~\extern\cesium-native\Cesium3DTilesSelection\src\TilesetContentManager.cpp:135] Cesium3DTilesSelection::`anonymous namespace'::unloadTileRecursively 
0x00007FFD492CA33D (CesiumForUnityNative-Runtime) [C:\DEV\CesiumDevelopment\Packages\com.cesium.unity\native~\extern\cesium-native\Cesium3DTilesSelection\src\TilesetContentManager.cpp:135] Cesium3DTilesSelection::`anonymous namespace'::unloadTileRecursively 
0x00007FFD4929620F (CesiumForUnityNative-Runtime) [C:\DEV\CesiumDevelopment\Packages\com.cesium.unity\native~\extern\cesium-native\Cesium3DTilesSelection\src\Tileset.cpp:140] Cesium3DTilesSelection::Tileset::~Tileset 
0x00007FFD4849DFD7 (CesiumForUnityNative-Runtime) [C:\DEV\CesiumDevelopment\Packages\com.cesium.unity\native~\Runtime\src\Cesium3DTilesetImpl.cpp:561] CesiumForUnityNative::Cesium3DTilesetImpl::DestroyTileset 
0x00007FFD4842E75F (CesiumForUnityNative-Runtime) [C:\DEV\CesiumDevelopment\Packages\com.cesium.unity\native~\Runtime\generated-Editor\src\DotNet\CesiumForUnity\Cesium3DTileset.cpp:1082] DotNet_CesiumForUnity_Cesium3DTileset_OnDisable 
0x000001D13FC0AE61 (Mono JIT Code) (wrapper managed-to-native) CesiumForUnity.Cesium3DTileset:DotNet_CesiumForUnity_Cesium3DTileset_OnDisable (intptr,CesiumForUnity.Cesium3DTileset/ImplementationHandle,intptr*)
0x000001D13FC0AB5B (Mono JIT Code) [C:\DEV\LogicClient\src\OverSight_Unity\Library\PackageCache\com.cesium.unity\Runtime\generated\Reinterop.RoslynSourceGenerator\Cesium3DTileset-generated.cs:158] CesiumForUnity.Cesium3DTileset:OnDisable () 
0x000001D0525B55B8 (Mono JIT Code) (wrapper runtime-invoke) object:runtime_invoke_void__this__ (object,intptr,intptr,intptr)
0x00007FFD680969CE (mono-2.0-bdwgc) [C:\build\output\Unity-Technologies\mono\mono\mini\mini-runtime.c:3445] mono_jit_runtime_invoke 

This is unfortunate, as using the URL Texture overlay with an Ellipsoid 3D Tileset would be ideal for my use case. Please let me know if there is any other information I can provide that can help fix this issue.

[kring]

@Reag can you please give us specific steps to reproduce the problems you're describing here? If you can point to a particular (public) server, and specific options used to configure the overlay, that will be extremely helpful!

[Reag]

Of course! I was testing with our mapbox key with the following configuration:

We use our own custom services implementation to allow users to inject data, but our template for this service is
https://api.mapbox.com/styles/v1/mapbox/satellite-streets-v11/tiles/{z}/{x}/{y}?access_token={ApiKey}
where the ApiKey field gets replaced before being injected into our map (Or for these tests, the Url Template Raster Overlay). The 3D Tileset itself is just the default settings, as this was an early test

When we use this same URL template on our map, we get the results we expect. However on the overlay this happens:

Finally, the crashes seem pretty random, but somewhat regular. In addition to the huge number of 'SqliteCache' database is locked errors spamming the console, it appears that the crashes occur most often when tiles are being loaded or unloaded on a sparse dataset. The mapbox implementation above only crashed once, while our private sparse test data crashed constantly. Unfortunately I'm unaware of any public sparse dataset, so I don't know how I can assist on that end.

One way I could frequently crash the editor was by setting the mapbox URL, loading some tiles, changing the URL, and then disabling the Cesium 3DTileset monobehaviour, especially after loading a lot of tiles.

[kring]

@Reag I haven't tried this (I don't have a MapBox key), but the first thing that jumps out at me is that your URL template is probably wrong. You need to use {reverseY} rather than {y}, because MapBox (if I'm not mistaken) numbers tiles from the North instead of the South.

That doesn't explain the crash or memory usage, but I think it will fix the mismapping.

[kring]

Oh I see where that came from now! Our documentation is wrong, and has flipped the definition of {y} and {reverseY}. 🤦

[Reag]

I really dont know what else to add. The URL Template Raster Overlay consistently crashes when I use it for any period of time larger than 2 minutes in the editor. With the ReverseY change, I can see the tiles in the correct location, but my unity editor still dies after a few minutes.

I rebuilt Cesium with some debug symbols, so perhaps something here can help:

Stacktrace

=================================================================
	Managed Stacktrace:
=================================================================
	  at <unknown> <0xffffffff>
	  at CesiumForUnity.Cesium3DTileset:DotNet_CesiumForUnity_Cesium3DTileset_Update <0x00160>
	  at CesiumForUnity.Cesium3DTileset:Update <0x001fa>
	  at System.Object:runtime_invoke_void__this__ <0x00187>
=================================================================

========== OUTPUTTING STACK TRACE ==================

0x00007FFFCA1A4323 (CesiumForUnityNative-Runtime) [C:\DEV\CesiumDevelopment\Packages\com.cesium.unity\native~\Runtime\src\TilesetMaterialProperties.cpp:150] CesiumForUnityNative::TilesetMaterialProperties::getOverlayTextureID 
0x00007FFFCA1DC564 (CesiumForUnityNative-Runtime) [C:\DEV\CesiumDevelopment\Packages\com.cesium.unity\native~\Runtime\src\UnityPrepareRendererResources.cpp:1936] CesiumForUnityNative::UnityPrepareRendererResources::detachRasterInMainThread 
0x00007FFFCA236DF8 (CesiumForUnityNative-Runtime) [C:\DEV\CesiumDevelopment\Packages\com.cesium.unity\native~\extern\cesium-native\Cesium3DTilesSelection\src\RasterMappedTo3DTile.cpp:124] Cesium3DTilesSelection::RasterMappedTo3DTile::update 
0x00007FFFCA22A79C (CesiumForUnityNative-Runtime) [C:\DEV\CesiumDevelopment\Packages\com.cesium.unity\native~\extern\cesium-native\Cesium3DTilesSelection\src\TilesetContentManager.cpp:1920] Cesium3DTilesSelection::TilesetContentManager::updateDoneState 
0x00007FFFCA22AA06 (CesiumForUnityNative-Runtime) [C:\DEV\CesiumDevelopment\Packages\com.cesium.unity\native~\extern\cesium-native\Cesium3DTilesSelection\src\TilesetContentManager.cpp:1180] Cesium3DTilesSelection::TilesetContentManager::updateTileContent 
0x00007FFFCA1F8B7F (CesiumForUnityNative-Runtime) [C:\DEV\CesiumDevelopment\Packages\com.cesium.unity\native~\extern\cesium-native\Cesium3DTilesSelection\include\Cesium3DTilesSelection\Tileset.h:547] Cesium3DTilesSelection::Tileset::_visitTileIfNeeded 
0x00007FFFCA1F90A6 (CesiumForUnityNative-Runtime) [C:\DEV\CesiumDevelopment\Packages\com.cesium.unity\native~\extern\cesium-native\Cesium3DTilesSelection\src\Tileset.cpp:1514] Cesium3DTilesSelection::Tileset::_visitVisibleChildrenNearToFar 
0x00007FFFCA1F8754 (CesiumForUnityNative-Runtime) [C:\DEV\CesiumDevelopment\Packages\com.cesium.unity\native~\extern\cesium-native\Cesium3DTilesSelection\src\Tileset.cpp:1439] Cesium3DTilesSelection::Tileset::_visitTile 
0x00007FFFCA1F8E0C (CesiumForUnityNative-Runtime) [C:\DEV\CesiumDevelopment\Packages\com.cesium.unity\native~\extern\cesium-native\Cesium3DTilesSelection\src\Tileset.cpp:1022] Cesium3DTilesSelection::Tileset::_visitTileIfNeeded 
0x00007FFFCA1F90A6 (CesiumForUnityNative-Runtime) [C:\DEV\CesiumDevelopment\Packages\com.cesium.unity\native~\extern\cesium-native\Cesium3DTilesSelection\src\Tileset.cpp:1514] Cesium3DTilesSelection::Tileset::_visitVisibleChildrenNearToFar 
0x00007FFFCA1F8754 (CesiumForUnityNative-Runtime) [C:\DEV\CesiumDevelopment\Packages\com.cesium.unity\native~\extern\cesium-native\Cesium3DTilesSelection\src\Tileset.cpp:1439] Cesium3DTilesSelection::Tileset::_visitTile 
0x00007FFFCA1F8E0C (CesiumForUnityNative-Runtime) [C:\DEV\CesiumDevelopment\Packages\com.cesium.unity\native~\extern\cesium-native\Cesium3DTilesSelection\src\Tileset.cpp:1022] Cesium3DTilesSelection::Tileset::_visitTileIfNeeded 
0x00007FFFCA1F90A6 (CesiumForUnityNative-Runtime) [C:\DEV\CesiumDevelopment\Packages\com.cesium.unity\native~\extern\cesium-native\Cesium3DTilesSelection\src\Tileset.cpp:1514] Cesium3DTilesSelection::Tileset::_visitVisibleChildrenNearToFar 
0x00007FFFCA1F8754 (CesiumForUnityNative-Runtime) [C:\DEV\CesiumDevelopment\Packages\com.cesium.unity\native~\extern\cesium-native\Cesium3DTilesSelection\src\Tileset.cpp:1439] Cesium3DTilesSelection::Tileset::_visitTile 
0x00007FFFCA1F8E0C (CesiumForUnityNative-Runtime) [C:\DEV\CesiumDevelopment\Packages\com.cesium.unity\native~\extern\cesium-native\Cesium3DTilesSelection\src\Tileset.cpp:1022] Cesium3DTilesSelection::Tileset::_visitTileIfNeeded 
0x00007FFFCA1F90A6 (CesiumForUnityNative-Runtime) [C:\DEV\CesiumDevelopment\Packages\com.cesium.unity\native~\extern\cesium-native\Cesium3DTilesSelection\src\Tileset.cpp:1514] Cesium3DTilesSelection::Tileset::_visitVisibleChildrenNearToFar 
0x00007FFFCA1F8754 (CesiumForUnityNative-Runtime) [C:\DEV\CesiumDevelopment\Packages\com.cesium.unity\native~\extern\cesium-native\Cesium3DTilesSelection\src\Tileset.cpp:1439] Cesium3DTilesSelection::Tileset::_visitTile 
0x00007FFFCA1F8E0C (CesiumForUnityNative-Runtime) [C:\DEV\CesiumDevelopment\Packages\com.cesium.unity\native~\extern\cesium-native\Cesium3DTilesSelection\src\Tileset.cpp:1022] Cesium3DTilesSelection::Tileset::_visitTileIfNeeded 
0x00007FFFCA1F90A6 (CesiumForUnityNative-Runtime) [C:\DEV\CesiumDevelopment\Packages\com.cesium.unity\native~\extern\cesium-native\Cesium3DTilesSelection\src\Tileset.cpp:1514] Cesium3DTilesSelection::Tileset::_visitVisibleChildrenNearToFar 
0x00007FFFCA1F8754 (CesiumForUnityNative-Runtime) [C:\DEV\CesiumDevelopment\Packages\com.cesium.unity\native~\extern\cesium-native\Cesium3DTilesSelection\src\Tileset.cpp:1439] Cesium3DTilesSelection::Tileset::_visitTile 
0x00007FFFCA1F8E0C (CesiumForUnityNative-Runtime) [C:\DEV\CesiumDevelopment\Packages\com.cesium.unity\native~\extern\cesium-native\Cesium3DTilesSelection\src\Tileset.cpp:1022] Cesium3DTilesSelection::Tileset::_visitTileIfNeeded 
0x00007FFFCA1F90A6 (CesiumForUnityNative-Runtime) [C:\DEV\CesiumDevelopment\Packages\com.cesium.unity\native~\extern\cesium-native\Cesium3DTilesSelection\src\Tileset.cpp:1514] Cesium3DTilesSelection::Tileset::_visitVisibleChildrenNearToFar 
0x00007FFFCA1F8754 (CesiumForUnityNative-Runtime) [C:\DEV\CesiumDevelopment\Packages\com.cesium.unity\native~\extern\cesium-native\Cesium3DTilesSelection\src\Tileset.cpp:1439] Cesium3DTilesSelection::Tileset::_visitTile 
0x00007FFFCA1F8E0C (CesiumForUnityNative-Runtime) [C:\DEV\CesiumDevelopment\Packages\com.cesium.unity\native~\extern\cesium-native\Cesium3DTilesSelection\src\Tileset.cpp:1022] Cesium3DTilesSelection::Tileset::_visitTileIfNeeded 
0x00007FFFCA1F90A6 (CesiumForUnityNative-Runtime) [C:\DEV\CesiumDevelopment\Packages\com.cesium.unity\native~\extern\cesium-native\Cesium3DTilesSelection\src\Tileset.cpp:1514] Cesium3DTilesSelection::Tileset::_visitVisibleChildrenNearToFar 
0x00007FFFCA1F8754 (CesiumForUnityNative-Runtime) [C:\DEV\CesiumDevelopment\Packages\com.cesium.unity\native~\extern\cesium-native\Cesium3DTilesSelection\src\Tileset.cpp:1439] Cesium3DTilesSelection::Tileset::_visitTile 
0x00007FFFCA1F8E0C (CesiumForUnityNative-Runtime) [C:\DEV\CesiumDevelopment\Packages\com.cesium.unity\native~\extern\cesium-native\Cesium3DTilesSelection\src\Tileset.cpp:1022] Cesium3DTilesSelection::Tileset::_visitTileIfNeeded 
0x00007FFFCA1F90A6 (CesiumForUnityNative-Runtime) [C:\DEV\CesiumDevelopment\Packages\com.cesium.unity\native~\extern\cesium-native\Cesium3DTilesSelection\src\Tileset.cpp:1514] Cesium3DTilesSelection::Tileset::_visitVisibleChildrenNearToFar 
0x00007FFFCA1F8754 (CesiumForUnityNative-Runtime) [C:\DEV\CesiumDevelopment\Packages\com.cesium.unity\native~\extern\cesium-native\Cesium3DTilesSelection\src\Tileset.cpp:1439] Cesium3DTilesSelection::Tileset::_visitTile 
0x00007FFFCA1F8E0C (CesiumForUnityNative-Runtime) [C:\DEV\CesiumDevelopment\Packages\com.cesium.unity\native~\extern\cesium-native\Cesium3DTilesSelection\src\Tileset.cpp:1022] Cesium3DTilesSelection::Tileset::_visitTileIfNeeded 
0x00007FFFCA1F90A6 (CesiumForUnityNative-Runtime) [C:\DEV\CesiumDevelopment\Packages\com.cesium.unity\native~\extern\cesium-native\Cesium3DTilesSelection\src\Tileset.cpp:1514] Cesium3DTilesSelection::Tileset::_visitVisibleChildrenNearToFar 
0x00007FFFCA1F8754 (CesiumForUnityNative-Runtime) [C:\DEV\CesiumDevelopment\Packages\com.cesium.unity\native~\extern\cesium-native\Cesium3DTilesSelection\src\Tileset.cpp:1439] Cesium3DTilesSelection::Tileset::_visitTile 
0x00007FFFCA1F8E0C (CesiumForUnityNative-Runtime) [C:\DEV\CesiumDevelopment\Packages\com.cesium.unity\native~\extern\cesium-native\Cesium3DTilesSelection\src\Tileset.cpp:1022] Cesium3DTilesSelection::Tileset::_visitTileIfNeeded 
0x00007FFFCA1F90A6 (CesiumForUnityNative-Runtime) [C:\DEV\CesiumDevelopment\Packages\com.cesium.unity\native~\extern\cesium-native\Cesium3DTilesSelection\src\Tileset.cpp:1514] Cesium3DTilesSelection::Tileset::_visitVisibleChildrenNearToFar 
0x00007FFFCA1F8754 (CesiumForUnityNative-Runtime) [C:\DEV\CesiumDevelopment\Packages\com.cesium.unity\native~\extern\cesium-native\Cesium3DTilesSelection\src\Tileset.cpp:1439] Cesium3DTilesSelection::Tileset::_visitTile 
0x00007FFFCA1F8E0C (CesiumForUnityNative-Runtime) [C:\DEV\CesiumDevelopment\Packages\com.cesium.unity\native~\extern\cesium-native\Cesium3DTilesSelection\src\Tileset.cpp:1022] Cesium3DTilesSelection::Tileset::_visitTileIfNeeded 
0x00007FFFCA1F90A6 (CesiumForUnityNative-Runtime) [C:\DEV\CesiumDevelopment\Packages\com.cesium.unity\native~\extern\cesium-native\Cesium3DTilesSelection\src\Tileset.cpp:1514] Cesium3DTilesSelection::Tileset::_visitVisibleChildrenNearToFar 
0x00007FFFCA1F8754 (CesiumForUnityNative-Runtime) [C:\DEV\CesiumDevelopment\Packages\com.cesium.unity\native~\extern\cesium-native\Cesium3DTilesSelection\src\Tileset.cpp:1439] Cesium3DTilesSelection::Tileset::_visitTile 
0x00007FFFCA1F8E0C (CesiumForUnityNative-Runtime) [C:\DEV\CesiumDevelopment\Packages\com.cesium.unity\native~\extern\cesium-native\Cesium3DTilesSelection\src\Tileset.cpp:1022] Cesium3DTilesSelection::Tileset::_visitTileIfNeeded 
0x00007FFFCA1F90A6 (CesiumForUnityNative-Runtime) [C:\DEV\CesiumDevelopment\Packages\com.cesium.unity\native~\extern\cesium-native\Cesium3DTilesSelection\src\Tileset.cpp:1514] Cesium3DTilesSelection::Tileset::_visitVisibleChildrenNearToFar 
0x00007FFFCA1F8754 (CesiumForUnityNative-Runtime) [C:\DEV\CesiumDevelopment\Packages\com.cesium.unity\native~\extern\cesium-native\Cesium3DTilesSelection\src\Tileset.cpp:1439] Cesium3DTilesSelection::Tileset::_visitTile 
0x00007FFFCA1F8E0C (CesiumForUnityNative-Runtime) [C:\DEV\CesiumDevelopment\Packages\com.cesium.unity\native~\extern\cesium-native\Cesium3DTilesSelection\src\Tileset.cpp:1022] Cesium3DTilesSelection::Tileset::_visitTileIfNeeded 
0x00007FFFCA1FB471 (CesiumForUnityNative-Runtime) [C:\DEV\CesiumDevelopment\Packages\com.cesium.unity\native~\extern\cesium-native\Cesium3DTilesSelection\src\Tileset.cpp:420] Cesium3DTilesSelection::Tileset::updateViewGroup 
0x00007FFFC940016E (CesiumForUnityNative-Runtime) [C:\DEV\CesiumDevelopment\Packages\com.cesium.unity\native~\Runtime\src\Cesium3DTilesetImpl.cpp:136] CesiumForUnityNative::Cesium3DTilesetImpl::Update 
0x00007FFFC938EBDF (CesiumForUnityNative-Runtime) [C:\DEV\CesiumDevelopment\Packages\com.cesium.unity\native~\Runtime\generated-Editor\src\DotNet\CesiumForUnity\Cesium3DTileset.cpp:1028] DotNet_CesiumForUnity_Cesium3DTileset_Update 
0x000002386EF1D3E1 (Mono JIT Code) (wrapper managed-to-native) CesiumForUnity.Cesium3DTileset:DotNet_CesiumForUnity_Cesium3DTileset_Update (intptr,CesiumForUnity.Cesium3DTileset/ImplementationHandle,intptr*)
0x000002386EF1D0DB (Mono JIT Code) [C:\DEV\LogicClient\src\OverSight_Unity\Library\PackageCache\com.cesium.unity\Runtime\generated\Reinterop.RoslynSourceGenerator\Cesium3DTileset-generated.cs:125] CesiumForUnity.Cesium3DTileset:Update () 
0x000002374CFE29D8 (Mono JIT Code) (wrapper runtime-invoke) object:runtime_invoke_void__this__ (object,intptr,intptr,intptr)
0x00007FFFEBC369CE (mono-2.0-bdwgc) [C:\build\output\Unity-Technologies\mono\mono\mini\mini-runtime.c:3445] mono_jit_runtime_invoke 
0x00007FFFEBB78474 (mono-2.0-bdwgc) [C:\build\output\Unity-Technologies\mono\mono\metadata\object.c:3068] do_runtime_invoke 
0x00007FFFEBB78560 (mono-2.0-bdwgc) [C:\build\output\Unity-Technologies\mono\mono\metadata\object.c:3115] mono_runtime_invoke 
0x00007FFFD5E9BA14 (Unity) scripting_method_invoke
0x00007FFFD5E737A3 (Unity) ScriptingInvocation::Invoke
0x00007FFFD5E5E924 (Unity) MonoBehaviour::CallMethodIfAvailable
0x00007FFFD5E5EA52 (Unity) MonoBehaviour::CallUpdateMethod
0x00007FFFD588A76C (Unity) BaseBehaviourManager::CommonUpdate<BehaviourManager>
0x00007FFFD5891D9A (Unity) BehaviourManager::Update
0x00007FFFD5B1AD6D (Unity) `InitPlayerLoopCallbacks'::`2'::UpdateScriptRunBehaviourUpdateRegistrator::Forward
0x00007FFFD5AE9067 (Unity) ExecutePlayerLoop
0x00007FFFD5AE91D7 (Unity) ExecutePlayerLoop
0x00007FFFD5AEE30F (Unity) PlayerLoop
0x00007FFFD6BEF38A (Unity) EditorPlayerLoop::Execute
0x00007FFFD6C05D87 (Unity) PlayerLoopController::InternalUpdateScene
0x00007FFFD6C07B4D (Unity) PlayerLoopController::UpdateSceneIfNeededFromMainLoop
0x00007FFFD6C018F1 (Unity) Application::TickTimer
0x00007FFFD71F63EA (Unity) MainMessageLoop
0x00007FFFD71FC0B4 (Unity) UnityMain
0x00007FF755F62FBA (Unity) __scrt_common_main_seh
0x00007FF89DBFE8D7 (KERNEL32) BaseThreadInitThunk
0x00007FF89E57C5DC (ntdll) RtlUserThreadStart

========== END OF STACKTRACE ===========

As it stands, I cant use this. Perhaps the particular provider I'm working with is problematic, or the default settings have an unusual interaction with the URL Template Raster Overlay. Perhaps there's some odd interaction with something else I'm doing (I do some tile exclusion based on user parameters). It could even me the number of tilesets I load (Our stress test scenario has over 100 tilesets loaded at once).

[edit]- For clarity, I'm testing with the default settings loaded when creating a new 3D Tileset set to Ellipsoid (Aside from disabling the creation of colliders, as it will create invalid colliders) and the default settings for the URL Template Raster Overlay (aside from using the url https://api.mapbox.com/styles/v1/mapbox/satellite-streets-v11/tiles/{z}/{x}/{reverseY}?access_token={token}

[edit2]- I think it might be because the default 3D Tileset doesnt have a material when created. After assigning the unlit cesium material to the ellipsoid tileset, it appeared to be stable for 10 min. This might be the main crash reason from my tests.