Unreal Engine Issues
Unreal Engine Issues
[Feature Request] Improve the comment on the Finterp family of functions to better explain the parameters and maybe edge cases like what happens when speed is 0)
UE - Gameplay - Apr 24, 2017Some users are finding the result of an interp speed of 0 for the FinterpTo node to be unexpected. The reasoning expressed is that if the speed is equal to 0 that there should be no change. This would ...
Sky Atmosphere Material Nodes not Correctly Represented in the Surface Cache for Nanite Enabled Static Meshes
UE - Graphics Features - Apr 1, 2025When nanite is enabled on a static mesh, lighting contributions from Sky Atmosphere material nodes are not incident on the static mesh and no longer present in the overall lighting of the scene. Th ...
UClass::HasProperty() returns true for properties in a child class even though the comment for the function indicates it checks for the property in the current class and parents of the current class
UE - Foundation - Core - Dec 21, 2018The comment describing UClass::HasProperty() indicates that it checks to see if a specified property exists in a class, or a parent of that class. However, when a property that exists in a child of ...
Project Crashes on Open when Implementing An Interface and Its Duplicate
UE - Gameplay - Blueprint - Apr 25, 2016The linked project crashes on open after attempting to implement an interface and a duplicate of that same interface with different function names. This has not been reproduced in a clean project, h ...
Assets with Render in Main Pass disabled show shadow artifacts
UE - Graphics Features - Apr 18, 2016This issue was originally reported specifically for Destructibles, but it appears to affect Skeletal Meshes, and static meshes when selected. When "Render in Main Pass" has been disabled skeletal an ...
Old property values can be applied when updating an unmapped reference in custom NetSerialize struct
UE - Networking - Apr 13, 2023This seems to be caused by the following:The struct, which has an actor reference property as well as some other properties, implements its own NetSerialize function.When the actor reference propert ...
Lumen Global Distance Field Trace Leaking due to Surface Cache Sampling
UE - Rendering - Graphics Features - Jan 12, 2026At specific distances from a thin wall, surfaces inside of a sealed chamber can receive indirect lighting from outside, leaking light into the chamber. This appears to be due to how SWRT handles sa ...
FIntVector has some code that refers to it being two dimensonal
UE - Gameplay - Mar 10, 2016There is code in the FIntVector class (IntVector.h) that seems to be copied from the FIntRect class which is a problem since FIntRect is two dimensonal while FIntVector is three dimensional. The one ...
Lightmaps on Mobile Devices Appear Dirtied and Pixelated
UE - Platform - Mobile - Jun 19, 2015Baked lighting on mobile has dirtied or pixelated lightmaps. When testing this issue I attempted to change various settings within the 'Lightmass' section and the changes made did not have much effe ...
UEditorValidatorBase::ValidateLoadedAsset() is not using the K2_ValidateLoadedAsset() output, effectively ignoring the Blueprint validation
UE - Editor - Content Pipeline - May 1, 2025UEditorValidatorBase::ValidateLoadedAsset() is not using the K2_ValidateLoadedAsset() output, effectively ignoring the Blueprint validation. The K2Result is not used later in the function, and this ...