Unreal Engine Issues
Unreal Engine Issues
Patterns On Landscape Spline Normals
UE - Graphics Tools - Terrain - Oct 31, 2025On higher-density Landscapes, Landscape Splines can lead to patterned artifacts in the geometry normals. Also tested on //UE/Release-5.6, CL:45232827 ...
Constraint Binding ID is broken on attach track when subsequence asset is moved.
zComponent - Archive - Jan 14, 2026Moving a level sequence asset that contains actors that are being referenced as a subsequence in an attach track causes the references to drop, even though the subsequence reference is correctly upd ...
WP: Using Make Writable when deleting actors from scene does not delete the actors
UE - Engine Scaling - Streaming - World Partition - Aug 4, 2026When working in a World Partition level using OFPA, trying to use the "Make writable" option instead of checking the asset out will result with the actor coming back to the map after restarting the ...
Cached State Machine is re-initialized whenever cached pose is referenced
OLD - Anim - May 19, 2015This may not be an expected use of state machines, but it is becoming a showstopper for a couple of users. These user's are caching their locomotion state machine and then using a second state mach ...
Duplicating meshes in blueprint improperly place transform widget and initially does not appear in viewport
UE - Gameplay - Blueprint - Jun 24, 2015If a mesh is duplicated within a blueprint components panel, it will be invisible in the viewport, the transform widget will incorrectly align itself and refrain from moving, and if the transform wi ...
Upgrading a project from a binary Engine to one built from source code does not keep the solution configuration and solution platform settings in Visual Studio.
UE - Foundation - Core - Feb 26, 2015Upgrading a code project created in a binary Engine version to an Engine built from source code results in the solution configuration and solution platform in Visual Studio being set to Debug and Wi ...
PakBlacklist does not seem to be excluding files properly
UE - Foundation - Core - Cooker - Feb 10, 2016The pak-blacklist files do not seem to be working fully. While some of the files may be excluded Engine/Content/Slate files are staying behind, which can be seen once you've used UnrealPak ...
Level Streaming Blocking Loads Do Not Work
UE - Gameplay - Jun 4, 2018It is believed that If Should Block On Load is TRUE, the entire game should freeze up until the entire level is loaded. Then If Should Block On Load is FALSE, the game continues to play while the le ...
Engine Crashes When Trying to Add an Entry to a TMap in a Nested Struct That is an Element of an Array
Tools - Oct 3, 2019When trying to add an entry to a TMap in a nested struct that is an element of an array the engine crashes. This doesn't happen if it is not an array of the nested struct. Attached are .h and .cpp ...
Changing "Coordinate Light Map Index" When "Generate Lightmap UVs" Is Enabled In A Static Mesh Crashes Engine
Tools - Dec 31, 2019When altering "Coordinate Light Map Index" in a static mesh when "Generate Lightmap UVs" is enabled in LOD 0 the engine will crash or "Coordinate Light Map Index" will be set to 0. A demonstration ...