Unreal Engine Issues
Unreal Engine Issues
BeginPlay execution order is different when using Game Mode instead of Game Mode Base
UE - Gameplay - Blueprint - Apr 26, 2019Using Game Mode instead of Game Mode Base causes the Begin Play event to trigger in a different order. This is shown in the reproduction with the Begin Play of the Player Controller and the Game Mod ...
VSM r.Shadow.Virtual.UseReceiverMaskDirectional Breaks Cache Behavior Overrides
UE - Rendering - Features - Shadows - May 19, 2026Since 5.7 this CVAR has been turned on by default and it ibreaks / prevents shadow cache behaviour to be set as we used to in 5.6 on meshes when r.Shadow.Virtual.UseReceiverMaskDirectional 1 Most o ...
Editor Crash When DFAO Viewport Has Zero Area
UE - Graphics Features - Apr 19, 2018I've reproduced this crash in 4.16, 4.17, 4.18, 4.19, and Main. Per licensee: The editor crashes if distance field ambient occlusion is enabled and a viewport is resized to have zero height. Th ...
Reading LightAttenuationTexture Produces Unexpected Results With Forward Rendering
UE - Graphics Features - Jul 5, 2018The expected behavior occurs in 4.19; unexpected behavior occurs in 4.20 and 4.21. Marking this as a regression. Per User: Reading the LightAttenuationTexture in a material receives interference ...
Post Process Material + Stereo Rendering = Left Eye Black
UE - Platform - XR - Dec 16, 2019Left Eye Renders black in VR when a PostProcess Material is applied. On Quest Right eye renders post process mat and left eye renders scene, but upsidedown. Also occurs in Packaged Project and/or ...
Crash if the setting of PhysicalAnimationComponent is changed in the same frame as teleport processing
UE - Simulation - Physics - Apr 24, 2020Crash when ApplyPhysicalAnimationProfileBelow node and UPhysicalAnimationComponent :: UpdateTargetActors by UPhysicalAnimationComponent :: OnTeleport run in the same frame. Because RuntimeInstanceDa ...
Remove reference to editor assets in cooked build from landscape visibility layer
UE - LD & Modeling - Terrain - Landscape - May 21, 2020As soon as the visibility tool is used, we're adding references to the "/Engine/EditorLandscapeResources/DataLayer" asset from landscape components. If the user decides to cook without editor data ...
OnObjectPropertyChanged Firing Excessively when FText is Bulk Edited
UE - Editor - Verse Class Editor - Jun 28, 2023If multiple game objects are selected at once and their text field is edited, instead of getting N events, it produces N-squared events. It looks like FPropertyHandleBase::SetPerObjectValue is call ...
Screenspace Denoiser creates artifacts for Ray Traced Shadows
UE - Rendering - Features - Ray Tracing - Nov 13, 2023Screen space denoiser creates two types of artifacts: artifacts around boundary for general lighting The artifact is there before 5.2 but since the ray traced shadow denoiser denoises on the sqr() s ...
When using a NavModifier with a NavBoundsVolume being in a SubLevel, unloading the level causes a crash.
UE - AI - Jul 19, 2018When repeatedly loading and unloading sublevels with a NavBoundsVolume, it will cause a crash when using a NavModifierVolume. When the NavMesh is unloaded, it seems that the number of the DirtyLayer ...