Unreal Engine Issues
Unreal Engine Issues
Find Collision UV Returning Unexpected Values
UE - Gameplay - Jan 19, 2017Find Collision UV is returning values that are above 1.0, when it is expected that these values would remain between 0 and 1. ...
[Waveform Editor] - Changing the Edit time on a Sound Wave that has TotalSamples=0.0 can crash editor
UE - Audio - WaveformEditor Plugin - Nov 10, 2022Rapidly changing the End Time on an asset that has TotalSamples=0.0 in the WaveFormEditor cases the editor to crash. Work around is to reimport the asset, which will restore that value. The crash hi ...
Clean DocumentDB setup fails indexing
UE - Foundation - Horde - Server - Feb 21, 2025Source [Link Removed] The user has encountered the error log: MongoDB.Driver.MongoCommandException: Command createIndexes failed: Implicit collection creation not supported when creating indexes I ...
[Soundfield Submix][Crash] - Unreal Ambisonics Crashes on Packaged Game and in Standalone
UE - Audio - Submixes - Jan 11, 2021Issue was reported by a user on the Unreal Engine forms. I tried to package the game with the other encoding options and this appears specific to using the Unreal Ambisonics option. I have only co ...
StartPlayInEditorGameInstance doesn't consider bStartInSpectatorMode for client instances
UE - Networking - Nov 15, 2022In UGameInstance::StartPlayInEditorGameInstance, the server instance will go through the normal process of creating the URL using BuildPlayWorldURL, which checks the FGameInstancePIEParameters' bSta ...
Crash in GameplayTag Editor Widget when editing array of tags on a component
UE - Gameplay - May 17, 2022Editing an array of gameplay tags on a component belonging to an actor instance can lead to a crash. There are inconsistencies with how the Gameplay Tag Editor widget behaves:Array of gameplay tags ...
Crash: Changing Material Property Overrides of Material Instance
UE - Graphics Features - Dec 14, 2016When a material has a static bool parameter AND this is overridden in a material instance, Trying to change Blend Mode or Shading Model under the Material Property Overrides crashes the editor. Thi ...
Collision Drawing in Cooked Builds (Development) doesn't Show Geometry for Nanite Meshes
UE - Graphics Features - Jun 2, 2025Context The showFlag.CollisionVisibility 1 cvar is a viewport visualization mode that highlights which Actors will block visibility. The showFlag.CollisionPawn 1 cvar is a Player Collision viewmode ...
r.SupportPointLightWholeSceneShadows Set to False Causes Crash When Trying to Place a PointLight
UE - Graphics Features - Jul 25, 2018If you disable Support PointLightWholeSceneShadows and try to place a point light in a level the editor will crash. Current work around is put shadows to low from engine scalability settings. Wor ...
Foliage meshes do not appear in high res screenshots after certain amount
UE - World Creation - Worldbuilding Tools - Foliage - Aug 24, 2017When using the Engine's High Res Screenshot tool, there is a limit on the amount of foliage that can be present before the meshes stop appearing. This number is around 1500 meshes, though I was not ...