Unreal Engine Issues
Unreal Engine Issues
(GAS) Block tags are ignored in version 5.5.2 if two abilities share the same parent tags structure.
UE - Gameplay - Gameplay Ability System - Feb 5, 2025Block tags are not working correctly in version 5.5.2, it was working in 5.5.1. This is caused by a change done in version 5.5.2. The exact CL is: CL 35930696 ...
Spherecast against complex geometry is returning odd results
UE - Simulation - Physics - Sep 19, 2023Turning on batching of sphere casts when colliding against complex gives incorrect results. Affects debug output and vehicle wheels and body movement. The issue is with the batch query mode which ...
Hierarchical Instance Static Mesh's array does not reorder itself correctly
UE - Graphics Features - Jan 16, 2017When an instance is removed from a Hierarchical Instanced Static Mesh's array, if there are indices that are further along in the array that fill that index, the last index in the array is used to d ...
Tick functions are skipped on the first frame in package build and standalone PIE
UE - Gameplay - May 19, 2025It's reported that all Tick functions are skipped on the first frame when running in packaged builds and standalone PIE. This is because both TickVisitedGFrameCounter and GFrameCounter are initializ ...
Starter Content's "P_Explosion" does not successfully convert to a Niagara System - incorrect loop, spawn, sprite size, and collision behaviors
UE - Niagara - Cascade - Mar 17, 2022Starter Content's "P_Explosion" does not successfully convert to a Niagara System - incorrect loop, spawn, sprite size, and collision behaviors Changes needed for / issues found with each emitter:A ...
Physics Constraints do not have the same values if they are part of an 'Always Loaded' level
UE - Gameplay - Dec 3, 2014Physics Constraints do not have the same values if they are part of an 'Always Loaded' level. They will work correctly in the Persistent level and a level that is Streamed in. This becomes problem ...
FMultiReaderSingleWriterGT isn't thread safe
UE - Foundation - Core - May 17, 2016From https://udn.unrealengine.com/questions/292741/fmultireadersinglewritergt-isnt-thread-safe.html: I've found that FMultiReaderSingleWriterGT has at least 2 bugs: The one that caused a deadlock ...
Raytraced reflection doesn't work with high roughness
UE - Graphics Features - Lumen - Oct 30, 2020Even when the max roughness for raytraced reflections is set to 1, they seem to be blended away at far below that value. For projects (e.g. film,vfx) where quality trumps speed it would be valuable ...
Planar Reflections Not Behaving As Expected in Splitscreen
UE - Graphics Features - Dec 19, 2018This occurs in //UE4/Main @ CL 4670176 Not a Regression. This is similar to https://jira.it.epicgames.net/browse/UE-59149 but when adding more player characters it seems to change the planar reflec ...
ChildActorComponent (SkeletalMesh) goes into tpose when calling SetChildActorClass
OLD - Anim - Mar 19, 2018There is an issue occurring where when updating an animation of a child actor by setting the Child actor class, the animation will flash the skeleton in a T-Pose before continuing with the animation ...