Unreal Engine Issues
Unreal Engine Issues
Crash in Network Prediction during PeriodicDamage GameplayEffects Test
UE - Networking - Jan 27, 2021Crash during Periodic Damage test for Gameplay Abilities system in the Network Prediction plugin, when both plugins are enabled. Related to a null GameInstance. ...
Replacing actors during LevelInstance inline editing applies incorrect transforms
UE - World Creation - Worldbuilding Tools - Level Instances - Jul 14, 2022When you finish editing a level instance, the actor is converted from the world position to the local position of the level instance, but if you replace the actor, the conversion process is performe ...
Volume artifacts (Bleeding)
UE - Graphics Features - May 31, 2023Runtime Virtual Texture rendering can allocate more FRDGBuffers than expected
UE - Rendering - Architecture - Dec 10, 2024When rendering runtime virtual texture pages without throttling (when r.VT.MaxUploadsPerFrame is high or during Movie RenderQueue captures) the number of FRDGBuffers allocated by the Render Graph Bu ...
Path Tracer Normals Issue
UE - Rendering - Graphics Features - Path Tracer - Oct 29, 2025Path Tracing normal maps reflect light differently than Lit, and do not look accurate. Also observed in //UE/Release-5.6, CL: 45232827 ...
Issue with r.SkyAtmosphere.TransmittanceLUT.UseSmallFormat
UE - Rendering - Graphics Features - Mar 30, 2026When "r.SkyAtmosphere.TransmittanceLUT.UseSmallFormat=1", some values for the Sky Atmosphere at some directional light angles can lead to the sun disk being cut off, and taking on a chord shape. A ...
Interface functions called as events in Blueprints that implement the interface cannot be set to replicate
UE - Gameplay - Blueprint - Jun 11, 2015Interface functions called as events in Blueprints that implement the interface cannot be set to replicate. When the event node is clicked, the Details panel is empty. Reproduced in 4.7.6, 4.8, and ...
Play rate track does not work when using CreateLevelSequencePlayer
UE - Anim - Sequencer - Oct 13, 2016Play rate track does not work when using CreateLevelSequencePlayer Regression: YES Worked: 4.12.5 CL:3039270 Broken: 4.13.1 CL:3142249 ...
Possible incorrect logical operator used in if statement in OnlineSessionInterfaceNull.cpp
UE - Networking - Dec 31, 2014A user pointed out a possible mistaken use of the && operator instead of the || operator in an if statement in source code. In the FOnlineSessionNull::GetResolvedConnectString() function in OnlineSe ...
Upgrading Project After Disabling Light PropagationVolume Plugin Causes Crash
UE - Foundation - Cpp Tools - Plugin System - Apr 1, 2016Attempting to upgrade a project from 4.10 to 4.11, or 4.11 to 4.12 with the LightPropagationVolume plugin disabled causes it to crash. Found in converting a 4.10 project to 4.11, and reproduced con ...