Unreal Engine Issues
Unreal Engine Issues
Editor crash when building lighting and world partition minimap
UE - World Creation - Worldbuilding Tools - World Partition - Apr 17, 2025It is possible for an editor crash to occur if a build is running (Lightmass in this case) and another is launched such as Build World Partition Minimap (as well as HLOD and Spline builders). This i ...
Virtual Shadow Maps on Spot Lights cause a blocky presentation similar to an incorrect mip level
UE - Graphics Features - Shadows - May 26, 2025Spot Lights may present with very blocky shadow artefacts when a long attentuation radius is provided with a small cone angle. In extreme cases, this causes the VSMs to invalidate every frame. Notab ...
GPU PCG node fails to cook if within Subgraph
UE - Graphics Tools - PCG - Graph - May 13, 2025When cooking a project that has a PCG graph with a subgraph containing a GPU node (Point Processor in the example provided), the cook fails with an illegal reference. However, the same GPU node used ...
Bug: Level Sequence OriginOverrideLocation not propagating to newly added nested ShotTracks
UE - Anim - Sequencer - May 14, 2025Within a Level Sequence, it's possible to override the transform (OriginOverrideLocation) of a ShotTrack. This generally works as expected — all nested ShotTracks should inherit and apply the transf ...
VSM SMRT SamplesPerRay CVars behave differently if groom assets are present leading to a potential full-scene shadow
UE - Runtime - Simulation - May 28, 2025When a groom is present, setting any SamplesPerRay SMRT CVar to zero results in an unexpected complete shadow projected from the light. ProjectLight() in VirtualShadowMapProjection.usf has addition ...
Plugin dependencies causing RI parameter initialization failures (UDN)
UE - Niagara - Oct 6, 2023Error on some Niagara emitters using the WindForce module: LogNiagaraEditor: Error: Invalid input type found while attempting initialize new rapid iteration parameters. Function Node: /Game/FX/Expl ...
EditCondition tag not working for FInstancedStruct property in UDeveloperSettings
UE - Editor - Verse Class Editor - May 30, 2025When using EditCondition to control the editability of FInstancedStruct properties in a class derived from UDeveloperSettings, the condition is only partially respected. Specifically: A TArray<FIns ...
Editor mode keyboard shortcuts active when in Play In Editor
UE - Editor - Developer Usability - Jun 20, 2025Editor mode keyboard shortcuts active when in Play In Editor. This behavior is a departure from previous versions. It was described by the licensee as confusing and it clashes with gameplay assigne ...
TInstancedStruct used in native actor class loses reference to Instanced UObject after BP recompilation
UE - Framework - Blueprint Compiler - Jun 25, 2025When a TInstancedStruct contains a UObject marked with EditInlineNew and DefaultToInstanced, the reference is lost after compiling the Blueprint but only when the struct is part of a native Actor cl ...
In a Geometry Collection, enabling Nanite Fallback in a Nanite Enabled collection won't generate a Physics Body when Nanite is disabled
UE - Runtime - Deformable - Jun 30, 2025In a Geometry Collection, enabling Nanite Fallback in a Nanite Enabled collection won't generate a Physics Body when Nanite is disabled. To verify this, follow the steps provided in the Steps to Re ...