Lumen generates gradated shading even if the light is a constant color sky light

UE - Rendering - Graphics Features - Lumen - Jul 22, 2022

Lumen generates a gradated shading even if objects are lit by a 360-degree constant sky light.[Link Removed][Link Removed] I looked into this and found that this comes from Spherical Harmonics int ...

GAS: GameplayAttribute picker incorrectly also lists AttributeSets' non-attribute properties

UE - Gameplay - Gameplay Ability System - Aug 21, 2025

Context: FGameplayAttribute's details customization lets designers pick any attribute property from any UAttributeSet class. Problem: This currently displays all properties of UAttributeSet class ...

Circular Throbber does not appear to be affected when setting the tint

UE - Editor - UI Systems - Jan 25, 2016

Circular throbber does not appear to change colors when changing the tint ...

Scene color is copied every draw call if materials read from it (redundant copy optimization is broken)

UE - Graphics Features - Aug 31, 2016

See TranslucentRendering.cpp // todo: this optimization is currently broken DrawingContext.bSceneColorCopyIsUpToDate = (DrawingContext.TranslucenyPassType == ETranslucencyPass::TPT_Separat ...

Emissive Input required for Landscape Painting to Appear Correctly when using Emissive Color and Make Material Attributes property Enabled

UE - LD & Modeling - Terrain - Landscape - May 1, 2017

When using the Make Material Attributes and landscape layer blends, if an Emissive input is being utilized on any one layer, the other layers must also utilize the emissive input in order for it to ...

YCoCg to sRGB?

UE - Niagara - Mar 20, 2024

Both the material and the Niagara compute shader use the same function to interpret the YCoCg color data, but the Niagara compute shader returns an incorrect color. Also found on CL: 32347737 in Re ...

The cloth mask vertexcolor is not updated when re-importing new vertexcolors

UE - Simulation - Physics - Character - Oct 7, 2019

The function UClothingAssetFactory::ImportToLodInternal that set the FClothPhysicalMeshData structure is not call again when we re-import so the vertex colors are not updated. ...

On Drop appears to cause update issues with widgets that are affected On Drag Enter

UE - Editor - UI Systems - Jan 3, 2017

On Drop appears to cause update issues with widgets that are affected On Drag Enter. In this example the widget only changes colors if a delay is placed in the On Drop function. The On Drop function ...