Unreal Engine Issues
Unreal Engine Issues
Crash on stopping PIE after using DemoRec in PIE
UE - Networking - Jan 20, 2016Crash on stopping PIE after using DemoRec in PIE. Possibly related to [Link Removed] which must be fixed, but happens upon stopping PIE. Reproduced in 4.11.0 Preview 3 binary and Main (//UE4/Dev-Ma ...
Crash when Undo after deleting a Material Layer of a Material Instance.
UE - Rendering Architecture - Materials - Apr 2, 2025In Unreal Engine version 5.5.4, the Editor crashes when performing Undo after deleting a Material Layer of a Material Instance ...
Adding a C++ CameraComponent to the Vehicle in the Vehicle C++ template causes compilation errors.
Docs - Samples - Jun 14, 2016When adding a C++ component based off Camera Component to the vehicle BP in the C++ Vehicle template, the code will fail to compile. Error message: D:\Epic Games\4.11\Engine\Source\Runtime\Engine ...
Launching from the editor can cause certain maps to become dirty and require saving and/or checkout
UE - Foundation - Core - Cooker - Sep 21, 2016Using the launch option in the editor will cause some maps in the "List of maps to include in a packaged build" to become dirty and require checkout when in a project that is connected to source con ...
Permanent FPS Drop After Using High Resolution Screenshot With Planar Reflections
UE - Graphics Features - Mar 9, 2017After taking a high res screenshot with a planar reflection actor in the scene the engine will experience a permanent performance hit relative to the resolution of the screenshot. For example if you ...
Weird grey bar renders on disabled planar reflections
UE - Graphics Features - Jul 11, 2017NOTE This is best seen if you are in a mobile Preview Rendering Level There is some rendering defect that can be seen as the camera moves around the Planar Reflection area. You can also see some ...
BroadcastOnActorMoved is not being called
Tools - Feb 13, 2018In 4.18, BroadcastOnActorMoved() is no longer being called when an actor is moved in a level. The PostEditChangeProperty() function checks to see if the name of the property that was changed matches ...
Instance UObjects in an array on an Actor replaced by pointers to other objects in array while PIE
UE - Gameplay - Blueprint Runtime - Sep 20, 2018When this issue occurs printing out the addresses of each item in the array shows that elements 2 and 3 have the same address, so for some reason the second element's value is being overridden by th ...
Editing parent emitters with mesh renderer in a niagara system causes crash
UE - Niagara - Nov 9, 2021After editing the parent emitters of a Niagara system with mesh renderer particles the engine will crash the next time the editor and system are opened. This was tested with both engine content cub ...
Opening a data table based on a struct with a slate brush variable crashes the editor
UE - Editor - UI Systems - Slate - Feb 1, 2016Attempting to open a data table based on a struct with a slate brush variable crashes the editor. Frequency: 2/2 CrashReporter: N/A ...