Unreal Engine Issues
Unreal Engine Issues
FName no longer equals FName_None when constructed with a trailing underscore and digits in range of 1-9
UE - CoreTech - Apr 15, 2025When an FName is created with a trailing underscore and any number of digits in the range of 1-9 the trailing digits are used as the internal number value for the FName lookup. This results in the F ...
Merging Splines causes Engine to Crash in 5.1
UE - World Creation - Worldbuilding Tools - Merge Actor - Dec 15, 2022Attempting to merge two spline actors causes the Engine to crash. This issue occurs with the Steps to Reproduce regardless if there are more branches added to the tree branch spline/enabled, and reg ...
Flipping faces on a brush affects all other brushes
UE - LD & Modeling - Modeling Tools - BSP - Apr 9, 2015Flipping faces on a brush affects all other brushes Subtractive brushes will have their internal faces show if enough additive brush faces are flipped. If the faces of a subtractive brush are flip ...
character movement velocity negatively affected by framerate
UE - Gameplay - Oct 28, 2015Lower framerates directly affect the velocity of a character's movement if that velocity is provided by another source. ...
BP hierarchy change triggers incorrect map actor load warning: AttachTo: '{0}' is not static {1}, cannot attach '{2}' which is static to it.
UE - Gameplay - Blueprint - Apr 11, 2024When a blueprint's component hierarchy is changed by changing a child component's mobility value to Static while deleting its parent component which has Movable mobility, levels saved with an outdat ...
The cap of a sliced procedural mesh is not affected by lighting
UE - Gameplay - Jul 14, 2016After slicing a procedural mesh, the cap on the sliced end does not seem to be affected by lighting. This can result in the end looking dark. ...
Android movie player doesn't work with ES 3.1
UE - Platform - Mobile - Jul 27, 2017Niether movie playback Startup Movies Play on ES3.1 ...
Enum to Byte conversion returns 2 for the first enum then 4 then 6 and so on rather than 0, 1, 2, etc
UE - Gameplay - Blueprint - Sep 1, 2015Enum to Byte conversion returns 2 for the first enum then 4 then 6 and so on rather than 0, 1, 2, etc. This is a regression; does NOT occur in 4.8.3. Reproduced in 4.9.0 binary and Main (2675088) ...
FBX files with multiple Meshes with only 1 unwrap per mesh will have invalid Light Map coordinates assigned
Tools - Jun 8, 2014An FBX with Multiple Meshes and only one unwrap per mesh (no 2nd UV channel) will import the first mesh in the file correctly but will produce invalid lightmass settings on each additional mesh impo ...
Cull Distance Volumes Affecting Actors After Being Deleted
UE - Graphics Features - Oct 7, 2019Cull Distance Volumes Affecting Actors After Being Deleted. Found in 4.22 CL# 7053642, 4.23 CL# 8386587, and 4.24 CL# 9428115 ...