Unreal Engine Issues
Unreal Engine Issues
Editor crashes if a sublevel with a landscape is duplicated then added to the persistent level as a sublevel.
UE - LD & Modeling - Terrain - Landscape - Aug 18, 2016If a sublevel is duplicated and contains a landscape, the editor will crash when the duplicate level is added to the persistent level as a sublevel. Frequency 4/4 Regression (yes) issue (does not ...
Environment Query System (EQS): EnvQuery runtime template object can be created with a non-unique name, corrupting the EnvQueryManager cache
UE - AI - Aug 5, 2025On file [Engine\Source\Runtime\AIModule\Private\EnvironmentQuery\EnvQueryManager.cpp:812], function UEnvQueryManager::CreateQueryInstance() uses StaticDuplicateObject() to create a new UEnvQuery* (d ...
Crash when Changing the Preview render levels (to ES3)
Tools - Feb 8, 2018If the Preview rendering level is changed to Android ES3.1 Preview during PIE, the editor will crash. ...
Linux crash upon opening maps in Soul: City content pack
UE - Graphics Features - Jan 29, 2018Opening the maps from the Soul: City asset pack on Linux causes a crash. This seems to be rendering related. It was originally reported as a Vulkan specific issue but we've reproduced it without Vul ...
Raytraced lights with Source Length > 0 behave incorrectly with Megalights
UE - Graphics Features - Ray Tracing - Mar 26, 2025When Megalights is enabled, light can leak into areas that should be occluded for lights with smallish (5.0) source length and source size. [Image Removed][Image Removed] This was taken with r.Ray ...
Collision for hidden mesh is not displayed in PIE using Showflag.collisionpawn
OLD - Anim - Oct 23, 2017When playing in viewport, the user is not able to see the collision of a mesh marks as hidden in game if they run the "Showflag.collisionpawn 1" console command. ...
Runtime Virtual Texture samples at low precision for very large volumes
UE - Graphics Features - May 31, 2022When using a runtime virtual texture with a resolution of greater than 2^24 we can start to see a lack of precision in sampling when the sampling UVs get closer to 1. To see this we need to be usin ...
HTML does not properly show mouse with Set show mouse cursor node
UE - Platform - Mobile - Jun 15, 2017When playing a project on HTML 5, the node "Set show mouse cursor" does not appear when the node is used. ...
Reflection capture memory not released
UE - Graphics Features - Mar 16, 2020Until 4.23.1, the value of the Texture Memory Cube is reduced to an appropriate size. It is explained in the following thread:https://udn.unrealengine.com/questions/398103/index.html ...
Clicking a dropdown menu inside of a blueprint node while zoomed out will cause the list to be cut off
UE - Gameplay - Blueprint Editor - Oct 24, 2016When you are zoomed out when clicking a dropdown box on a blueprint node, the dropdown menu gets cut off on length and width. Length isn't that big of a deal as you can scroll but it does cut off th ...