Unreal Engine Issues
Unreal Engine Issues
DiffuseIndirect_Lumen_3 parameter missing and causing crash with Screen Space reflections and Lumen Async Compute
UE - Graphics Features - Lumen - May 3, 2025When the Reflection Method is set to Screen Space and Lumen reflections async compute is enabled Unreal will crash because DiffuseIndirect_Lumen_3 parameter missing, due to how DenoiserOutputs are o ...
Memory Leak in Actor Component Blueprints
UE - Gameplay - Blueprint - Dec 2, 2015Slow memory leak occurs after opening Actor Component blueprints. ...
Manipulating Morph Target on Master Component distorts Slave Components
OLD - Anim - Apr 1, 2016Manipulating Morph Targets on Master Component distorts Slave Components. It makes no difference if the slave component has the morph target being manipulated in the master See attached image and ...
If using BP that inherits DataAsset as Value of Map in Struct, it will be replaced with PLACEHOLDER-CLASS after restarting editor.
UE - Gameplay - Blueprint - May 31, 2022USplineComponent::FindLocationClosestToWorldLocation does not function correctly with non-uniform scale
UE - Framework - Components - Jul 19, 2022Licensee reports incorrect results with FindLocationClosestToWorldLocation when used with non-uniformly scaled spline components. ...
Collision build of LiDAR point cloud assets at runtime does not apply
UE - Editor - Content Pipeline - Datasmith - Oct 24, 2023Collision build at runtime for LiDAR point cloud does not apply. This applies to Editor and Standalone. If you do not allow collision builds at runtime, this module should not be available at runtim ...
Changing number of existing UHierarchicalInstancedStaticMeshComponent in Blueprint causes crash.
UE - Graphics Features - Oct 14, 2016If using a UHierarchicalInstancedStaticMeshComponent in a C++ class and adding instances via the OnConstruction( ) function, editor can crash. ...
Removing components from Landscape with simplified collision results in assertion
UE - LD & Modeling - Terrain - Landscape - May 18, 2017Performing operations on a Landscape with simplified collision can result in an assertion ...
Refraction not working with MakeMaterialAttributes
UE - Graphics Features - Sep 14, 2015When setting a material to Use Material Attributes and then feeding in a Refraction value with MakeMaterialAttributes, the refraction doesn't work properly Reported in 4.8, but I tested in Main as ...
Character Blueprint Cannot Execute Montage to Play at a Negative Play Rate
OLD - Anim - Aug 3, 2016While an Animation Montage can be played at a negative play rate in Persona, the user cannot use the Character Blueprint to execute this action. ...