Unreal Engine Issues
Unreal Engine Issues
GeometryCollectionComponent take +1 frame to be marked as dirty
UE - Runtime - Simulation - May 25, 2023Debugging the code I have been able to verify that in GeometryCollectionComponent.cpp line:2318, the if condition happens every two frames. I think DynamicCollection is not setting all the frames a ...
Camera Shake Oscillation Duration no longer accepts -1 as indefinite
UE - Gameplay - Jul 30, 2015The Camera Shake Class no longer allows for indefinite shaking via setting a negative value in the Oscillation duration, per the tooltip instructions. This happens when using either the Play World ...
Windows Mixed Reality - Setting haptic to 1 and firing haptic causes editor crash
UE - Platform - XR - Oct 15, 2018r.MobileContentScaleFactor appears to be ignored defaulting to 1 on Mobile Devices
UE - Platform - Mobile - Feb 28, 2022r.MobileContentScaleFactor = 0 should return Native Resolution; 1 should return Standard definiton; 2 shold return an High Definition Resolution. It seems that r.MobileContentScaleFactor is being i ...
Setting Fixed Frame Rate Prevents Particle Collision In PIE, Standalone, and Packaged Game
UE - Graphics Features - Oct 12, 2016If you set the project to use a fixed frame rate, particle collision no longer works. ...
Cooker is asserting in Class.h on UE 5.7.1
UE - CoreTech - Dec 18, 2025From the linked EPS case: ---------------------------- In UE 5.7 there were some changes to how Enum member names are stored. This change introduces an assert when cooking using the Editor Debug e ...
When used with First Loop Start Frame Offset and Use Animation Blueprint, the character will alternate between the specified animation and the reference pose
UE - Anim - Anim in Engine - Jan 30, 2023If you use StartFrameOffset set to 1 or higher in conjunction with the Use Animation Blueprint, the character's animation will be rough towards the end of the section. Specifically, it seems that th ...
Fixing a Blueprint's compilation error after editor reload causes instances to lose transform
UE - Framework - Blueprint - Feb 23, 2023Saving and reloading a Blueprint instance with a compilation error, a.k.a., "Bad Blueprint" will lead to a transform reset when the Blueprint is successfully recompiled. ...
Unknown force is applied to the cloth when changing the skeletal mesh LoD with cloth.
UE - Simulation - Physics - Character - Jul 11, 2019There are 3 issuesEach particles don't restore its previous position. Which is for calculating velocity by verlet iteration.The previous transform is cleared by current transform. It provides zero v ...
User crashes during play/save/open project in UE 4.6.1
UE - Gameplay - Blueprint - Feb 25, 2015User reports crashing upon open, saving or playing their project in 4.6.1 in Binary. Assertion failed: TargetDelegate [Link Removed] [Line: 5407] ...