Unreal Engine Issues
Unreal Engine Issues
XR -ARKit - Tracked Planes are not attached to the real world objects when moving the camera around
UE - Platform - XR - May 22, 2024When the user attempts to place an object on a tracked plane it slides around the environment not staying in the expected place. Using the ARDebugcheck project with the show planes option you can se ...
[CrashReport][Assert] UnrealEditor-RHI!FRHIResource::MarkForDelete() [Engine/Source/Runtime/RHI/Private/RHIResources.cpp:49]
UE - Rendering Architecture - Materials - Dec 18, 2024One of the users described this issue as below. "At seemingly random times while working in the material graph, some action will cause a hitch or freeze, and quickly after the engine will crash, an ...
Sequencer: Camera Lock Breaks After Closing Sequencer and Re-entering PIE
UE - Anim - Sequencer - Oct 9, 2025Viewport camera lock in Sequencer fails to persist correctly after running PIE with Sequencer open, then closing Sequencer and running PIE again. The issue consistently reproduces using the attached ...
Noise Node used in UI Material is rendering Black
UE - Graphics Features - Feb 15, 2016The Noise Node when used in a UI Material is rendering completely black in 4.11. This is a Regression from Behavior in 4.10.2 It looks like the Noise Node (at least form the preview of the noise i ...
Crash on Mac when adding Convex Collision to a mesh converted from a brush
UE - Platform - Apple - Jun 6, 2017This is one of the top Mac crashes occurring in 4.16. Caused by adding Auto Convex Collision to a mesh converted from a brush. Does not occur on Windows. User DescriptionsI was trying to add a conv ...
[CrashReport] ULevel::GetWorldSettings() - UMaterialInstanceThumbnailRenderer::Draw
Tools - Aug 29, 2017This is a common assertion that has occurred since at least 4.14 and affected nearly 100 users. The callstack is similar to [Link Removed], which was marked fixed for 4.14. User DescriptionsUndoi ...
Compile warning/error in the FUpdateCollisionResponseHelper destructor
UE - Simulation - Physics - Dec 15, 2017It has been reported that when building with Visual Studio 2017 version 15.5.1, a warning/compile error is shown in BodyInstanceCustomization.cpp: warning C4287: '<': unsigned/negative constant mism ...
Physics replicates incorrectly on the Client-Side on sloped surfaces
UE - Simulation - Physics - Jul 30, 2019Replicated objects don't behave correctly on the client-side on slopes when not sleeping. By placing two cubes on one another and slightly rotating the bottom one to create a very gentle slope, the ...
[CrashReport] UE4Editor_Engine!FDefaultMaterialInstance::GetMaterial() [material.cpp:243]
UE - Graphics Features - Aug 14, 2017This is a trending crash coming out of the 4.17 release that also occurred with some frequency during 4.16. User DescriptionsTrying to apply a material (Normal, Metallic&Roughness, and Basic)I was ...
Uniform scaling in the viewport not working as expected when additive mode is enabled
UE - Editor - Workflow Systems - Apr 2, 2022The uniform scaling does not work as expected Repro Steps: 1) Add a cube to a level 2) Set the scale (X = 16, Y=9, Z=9) 3) Click the Lock icon to activate the Uniform Scale feature 4) In the viewpor ...