Unreal Engine Issues
Unreal Engine Issues
Asset Override Editor does not have vertical scrollbar until window is resized
OLD - Anim - Oct 22, 2015If a child anim blueprint has enough animations to go beyond the view of the asset override editor, the override editor will not show a vertical scrollbar until the window is resized. ...
Some Twinmotion library assets do not render in Path Tracer in files with a large number of assets
TM - Rendering - Apr 17, 2025Reported in SF [Link Removed] In scenes containing large numbers of certain Twinmotion assets, when activating Path Tracer, some of the assets will not render. The assets will render normally in St ...
Mesh emitters are not obeying changes to r.DetailMode
UE - Niagara - Sep 23, 2015Emitter modules that are set to the "High" detail mode are removed when changing the engine scalability settings to "low", but not replaced when setting them back to "Epic." The emitter is updated c ...
Splitting struct pins calls override warning - does not remove warning when saved as warning states
UE - Gameplay - Blueprint - Feb 29, 2016Splitting struct pins calls override warning after compiling a blueprint. The warning states that it will be removed once the asset is saved, however upon saving the asset does not disappear. ...
Setting NavModifierVolume's AreaClass at runtime does not result in navmesh rebuilding
UE - AI - Apr 23, 2015The volume does accept the change and if it gets moved the navmesh will rebuild with new area set. The core issue is that setting NavModifierVolume.AreaClass at runtime does not notify navigation sy ...
Dynamic Obstacle Blueprint components do not correctly affect navmesh in standalone mode
UE - AI - Jul 21, 2015Static mesh components of blueprints with "Is Dynamic Obstacle" set to true do not correctly affect navigation when standalone mode is initially run. Once another object is moved and the navmesh is ...
Lighting Channels Do Not Function with 78+ Lights on Actor
UE - Graphics Features - Oct 20, 2017Lighting channels do not function when the number of lights affecting actors is 79 or higher. Any number of lights that is 78 or fewer will honor lighting channel assignments. ...
Editor stalls on Mac after key up, mouse up
UE - Platform - Apple - Dec 19, 2019UDN user reported a performance hit on Mac with the latest Hotfix release when the user is interacting with the editor either through keyboard or mouse input. This performance hit is noticeable whe ...
UMG curve editor values are set to 0 when dragging a set value
UE - Editor - UI Systems - Jul 10, 2015An example of this issue would be that after setting the color and opacity setting along the time line and then trying to click and drag that key frame it will set the value for the currently select ...
Changing LODBias on landscape sections causes grass type placement issues
UE - LD & Modeling - Terrain - Landscape - Jun 6, 2018Changing LODBias on landscape sections causes a grass type placement issues. The grass will be floating and rotated incorrectly. Found in 4.18 CL# 3832480, 4.19 CL# 4033788, 4.20 Preview 1 CL# 4 ...