Chaos Cloth Self Collisions Spatial is slow when Tris are much smaller than thickness

UE - Simulation - Core - Apr 21, 2023

This came via a UDN. Very small triangles can generate very small lods, which make query time really slow if your self collision thickness is significantly larger. You will do X^3 checks per query ...

GameplayEffects: Inherited UAssetTags and UTargetTags do not update their referenced tags correctly with inheritance

UE - Gameplay - Jan 25, 2024

When inherited, it is reasonable to expect the tags added by the parent to be reflected in the children. If the parent is editted after the children, however, tags that are added or deleted are not ...

Skeletal Mesh component that uses Anim BP does not translate after swapping root bone on particular Anim section in Sequencer

UE - Anim - Anim in Engine - Apr 19, 2023

Repro Rate: 5/5 Regression: Unconfirmed - Functionality is not implemented in previous version Skeletal Mesh with default slot Anim BP applied does not translate after Swap Root Bone on particular ...

Dynamic point lights generate shader compile errors on HTML5

UE - Platform - Mobile - Aug 20, 2015

The new ES2 movable point lights look promising. Unfortunately, there seems to be an issue with them in HTML5 builds. They work great in the ES2 preview mode in the editor, but when running in an ac ...

Add sanitization code surrounding RigidBody + RigidBodyDynamic flags

UE - Simulation - Physics - Jul 20, 2016

PhysX throws warnings (which are escalated to errors) when CCD and Kinematic are in invalid states (they can only be enabled exclusively). The code to fix this has already been submitted, but may c ...

Color Picker window closes when selecting objects in the viewport with the Eye Dropper Tool

Tools - Apr 13, 2017

The color picker window stays open if the Eye Dropper tool selects color from anywhere other than the viewport. The color is captured in the color picker before it closes, but makes it a nightmare t ...

Numerous LogMetal: Warning: AsyncCopyFromBufferToBuffer on overlapping ranges Warnings

UE - Graphics Features - Mar 13, 2018

Numerous LogMetal: Warning: AsyncCopyFromBufferToBuffer on overlapping ranges Warnings Warnings do not appear to be linked to any visual/performance problems in the editor. Could be safely ignored. ...

Remote standalone build of a project fails due to incorrect path to project's Info.plist file

UE - Foundation - Cpp Tools - Automation Tool - Sep 17, 2018

Attempting to use UAT on Windows to remotely create a standalone build of a project for Mac fails in 4.19. The error message indicates that it cannot find part of the path to the project's Info.plis ...

Duplicating a Sequencer causes events from the original sequence to fire when the second Sequencer is ran

UE - Anim - Sequencer - Nov 13, 2018

When using a Sequence that is a duplicate of another, without changing the event names, the duplicate Sequence will still fire off the event from the original even if the values are changed. Changin ...

UMG Slider displays long or wrong percentages when Step Size is set to 0.1

UE - Editor - UI Systems - Apr 24, 2020

When the Step Size is set to 0.1 for a Slider and Slider value is multiplied by 100, it will display weird numbers when moving the slider back from 100%. Changing the Step Size to 1 and changing th ...