Unreal Engine Issues
Unreal Engine Issues
Unable to change Actor Coloration View Modes in PIE
UE - World Creation - Worldbuilding Tools - Jul 20, 2025When in PIE changing Actor Coloration view modes from the viewport visualisation mode [Liit] -> [Actor Coloration] -> ... Does not update correctly when switching view mode and sometimes isn't corr ...
OcclusionFeedback may not be performant for primitives with large screensize
UE - Platform - Mobile - Dec 13, 2025A licensee reported that the performance could be worse in some scenarios (probably a small scene with large objects) with OcclusionFeedback enabled ( 20fps up if disabled), tested on a Qualcomm 870 ...
Nanite Skeletal Mesh ignores Hidden Material Section flag
UE - Rendering - Features - Nanite - Mar 11, 2026Unlike non-Nanite Skeletal Meshes, Nanite-enabled Skeletal Meshes do not correctly respond to the Show flag passed via ShowMaterialSection(). Consequently, the Isolate checkbox for material slots in ...
Matinee movie recording is broken in 4.10
Tools - Dec 18, 2015When trying to record a movie from a matinee in 4.10, it can fail for a number of reasons: 1. The folder does not exist 2. The cinematic view modes do not take effect 3. Trying to record a streamin ...
Loops don't work with SimpleParallel BT composite node
UE - AI - Dec 16, 2014Loop decorators don't work with SimpleParallel BT composite node. We need to either fix it, or if we remove support for it restrict users from putting these decorators on SimpleParallel's children. ...
Changing the name of a GameMode Blueprint that is set as the Default in Project Settings and then clicking the Project Settings Default GameMode dropdown will crash the editor
Tools - Jul 7, 2015Changing the name of a GameMode Blueprint that is set as the Default in Project Settings and then clicking the Project Settings Default GameMode dropdown will crash the editor. No crash report is ge ...
Skylights not Updating in Blueprint Viewport
UE - Graphics Features - Sep 26, 2016When modifying the properties of a Skylight actor as a component within Blueprints, the changes are not reflected in the Blueprint viewport. If you drag the blueprint into an empty scene and modify ...
Switching CanEverAffectNavigation on a Dynamic Obstacle Leaves Original Area Behind
UE - AI - Sep 15, 2016When setting Can Ever Affect Navigation to false, moving it, and then setting it back to true, the originally affected area remains, and it also creates a new affected area. This occurs each time y ...
Macro Library tries to recompile upon PIE when Auto Recompile is turned off and library does not need to be recompiled
UE - Gameplay - Blueprint - May 11, 2016Macro Library tries to recompile upon PIE when Auto Recompile is turned off and library does not need to be recompiled. Note The macro library does not have to be used to cause the compilation mes ...
Sphere Object Not Firing Hit Events
UE - Gameplay - Mar 14, 2016When moving a sphere using Add Actor World Offset, hit events on that sphere are not fired. However, doing the same thing with a cube causes hit events to fire off as expected. When you enable grav ...