Unreal Engine Issues
Unreal Engine Issues
Having lots of SpeedTrees loaded in/out/in with level streaming causes crash with Standalone game
UE - Foundation - Core - Jan 21, 2015Description: When using lots of static meshes placed in the scene and using level streaming to switch levels out can cause standalone game to crash while loading the map back in. For example, if you ...
AddChildActorComponent in Construction Script Causes Pending Kill Error
UE - Gameplay - Blueprint - Feb 16, 2016When using AddChildActorComponent in the construction script of an actor and attempting to get a reference to the child actor that is stored in a variable on Event Begin Play, the editor throws erro ...
After importing morph target: Ensure condition failed: Referencing SkeletalRenderGPUSkin.cpp
Tools - Sep 23, 2017Hit handled ensure when dragging the slider in Morph Target PreviewLogOutputDevice: Error: Ensure condition failed: DynamicData->MorphTargetWeights.Num() == LODModel.MorphTargetVertexInfoBuffers.Get ...
On the Details Panel of Niagara Function Inputs, the Type selector does not show "Static" types.
UE - Niagara - Apr 7, 2025Consider a Niagara Function or Module Script containing a Static Switch node. If the "Expose as Pin" option is enabled for its selector variable, an input pin with type "static bool" appears. In one ...
Regression: Asset Action Utility "Supported Classes" setting is not working correctly when "IsActionForBlueprints" is true
UE - Editor - Workflow Systems - Aug 16, 2024When creating an Editor Utility Blueprint derived from "Asset Action Utility", UE allows the user to override function "IsActionForBlueprints". When it returns true, the "Supported Classes" setting ...
Code based interfaces do not appear in Interface selection dropdown
UE - Gameplay - Blueprint - May 4, 2017When adding an interface to a blueprint, only blueprint created interfaces are available. Engine / custom interfaces written in code are not listed. Regression: Yes - custom interfaces are present ...
Post Process Material: different color behavior in Sequencer Render vs Movie Render Queue
UE - Anim - Sequencer - May 21, 2020During lookdev, I use a post process material to bring reference images into the engine to compare against my work. The goal is for the reference image to not be touched by any of the Unreal color ...
Velocity Scene Texture Data Integrity Issues
UE - Graphics Features - Jan 8, 2026When a Post-Process Material uses the Scene Texture Material Expression, the following code is generated: ``` MaterialFloat2 Local0 = Parameters.TexCoords[0].xy; MaterialFloat2 Local1 = ClampSceneT ...
Passthrough in ARHandheld Template fails to work on Android
UE - Platform - XR - Sep 11, 2024After using the Begin Scan, the application does not show anything with the camera, though it should be noted that you can still find, select planes and then place the model on it. For now the bug w ...
Widget components and widgets in screen space are not the same color
UE - Editor - UI Systems - Jun 27, 2016Widget components appear to be affected by lighting. This causes differences in color between widget components and widgets that have been added to the viewport. ...