Unreal Engine Issues
Unreal Engine Issues
[AI] Using a Reference Value for scoring in an EQS test produces the opposite effect of its tooltip.
UE - AI - EQS - Sep 23, 2022An EQS Query scores the tests using reference values opposite of how the comments and tooltips describe. It will score items closest to the referenced value lower than those further away, but the ex ...
Masked TwoSided material causing lumen direct lighting to leak through walls
UE - Graphics Features - Lumen - Apr 23, 2024It appears that LumenScene's Hardware Ray Tracing is causing light leaking into a sealed room (which should be perfectly black). This bug does not appear to happen on AMD GPUs. ...
Packed level actors and Level instances are sometimes not included in HLOD build on a World Partition Level
UE - World Creation - Worldbuilding Tools - HLOD - Mar 14, 2025Context World Partition - Hierarchical Level of Detail (HLOD) system uses custom HLOD Layers to organize large amounts of Static Mesh Actors and generate a single proxy mesh and Material. Problem T ...
Building Lighting will Generate Additional Lightmaps after Rotating Lightsource
UE - Graphics Features - Jul 7, 2015Lightmap sizes seem inconsistent after rotating a light source and rebuilding the lighting. This causes concern about file sizes when packaging the project that is using baked static lighting. The ...
Orthographic Camera view doesn't work with movable directional light shadows and partly with stationary shadows
UE - Graphics Features - Feb 26, 2015See attached video for clear examples. When using the orthographic camera perspective with default light settings to stationary for directional light source. Other light sources work as intended. T ...
Illegal Else Without Matching If
UE - Simulation - Physics - Feb 3, 2017Looks like there's a missing if/else pair in BodyInstance.cpp ...
First Person Example Project Crash when character movement component is cast in viewport.
Tools - Jul 23, 2019Crash is caused by incorrect cast to display ActorComponent in viewport (gizmo used to move it should not be present) ...
Bitfield enums don't cast correctly in Blueprints
UE - Gameplay - Blueprint Compiler - Jan 22, 2025The licensee already investigated this a little. The problem appears to be that UKismetNodeHelperLibrary::GetValidValue should be calling IsValidEnumValueOrBitfield as opposed to IsValidEnumValue. ...
When importing static mesh using interchange and collision is generated, the asset does not have Collision Generated set to true
UE - Editor - Content Pipeline - Import and Export - May 19, 2025Context: The Interchange Framework is Unreal Engine's import and export framework. When importing a mesh without collision, collision can be auto-generated. Problem: The problem is when importing s ...
'Desktop User' is unable to see the laser pointer pointed by 'VR User'.
UE - Editor - Content Pipeline - Datasmith - Importer - Dec 19, 2018Host is unable to see lasers of clients. ...