Unreal Engine Issues
Unreal Engine Issues
[CrashReport] ULevel::GetWorldSettings - UStaticMeshThumbnailRenderer::Draw
Tools - Oct 30, 2017This is a common crash that has occurred since at least 4.14. The callstack is nearly identical to [Link Removed], which appears to be fixed in 4.18; and [Link Removed], which has not. The differen ...
Assign Event On Destroyed no longer creates Custom Event Node
UE - Gameplay - Blueprint Editor - Oct 9, 2018When creating a new Blueprint Class based on an Actor parent, If you navigate to the Actor's event graph, and right click on the editor blank space; type "Assign on Destroyed" and select "Assign ...
Materials Added to an FBX Will Not Be Added When Reimporting
Tools - Oct 25, 2018Adding a material to an FBX with a Multi/Sub-object material, then reimporting the FBX will not import the new material. The material element will be added to the mesh but the material applied will ...
Volumetric fog does play nice with dynamic res
UE - Graphics Features - Jan 4, 2019Dynamic resolution dynamically changes the the size of the viewport in render targets. The thing is when the resolution changes: it is reprojecting previous frame that is stored in history render ta ...
Editor crashes when re-opening a project that had previously successfully applied a Live Coding patch
UE - Foundation - Cpp Tools - Live Coding - Apr 9, 2019The Editor will crash while opening a project that had previously successfully had a Live Coding patch applied, and then was closed. The `LiveCodingConsole.exe` process continues to run after both t ...
Actor being moved via sequencer has inherited velocity that ignores play rate scale
UE - Anim - Sequencer - Nov 8, 2019When an actor that can be stood on and jumped off of is moved in a sequencer it's inherited velocity doesn't scale with the Sequence play rate. If you jump in the opposite direction the cube is goin ...
Asset localization does not work properly for Paper2D related assets such as Flipbook
UE - Core - Systems - Mar 18, 2022This issue is resolved by changing Paper2D's LoadingPhase to PostConfigInit, but this is a workaround. We suggest a better long term fix via AssetRegistry changes (see comments). In the default la ...
Pose watches don't display correctly with compatible skeletons
UE - Runtime - Anim BP - Aug 19, 2022"Hello, we've found a quirk with ABP's pose watch and compatible skeletons. Same setup as above. We have skeleton A as the base and skeleton B as a compatible skeleton. They both share similar hiera ...
Iris - large fast arrays serialize multiple elements when only one is dirtied
UE - Networking - Iris - Apr 8, 2025This seems to be a result of how the changemask is handled for fast arrays. Because the changemask is a fixed set of bits (defined by IrisFastArrayChangeMaskBits), a single bit can represent multipl ...
The hierarchy of Actors in LevelInstances can break when using BPs as parent
UE - World Creation - Worldbuilding Tools - Level Instances - Feb 18, 2026The hierarchy of a LevelInstance actors (Outliner) will break when cooking. The source is the call to AActor::RerunConstructionScripts in FWorldPartitionLevelHelper::MoveExternalActorsToLevel. The ...