Unreal Engine Issues
Unreal Engine Issues
Modulate Shadows shadow overlap not blended
UE - Platform - Mobile - Oct 15, 2015When using modulated shadows turned on for the directional stationary light in your mobile project, the movable objects shadows will not be blended. Image attached to illustrate the inconsistency. ...
Broken references after renaming template default folders
Tools - Jan 17, 2017When a template project's default folders are renamed (such as Geometry in the First Person Template), the original folder name is still shown in the content browser. Relaunching the project will s ...
FBlueprintCompileReinstancer::ReplaceInstancesOfClass_Inner() can fail to resolve reinstanced archetypes.
UE - Foundation - Cpp Tools - Hot Reload - Mar 8, 2017From UDN. This is a hotreload bug - even though it uses FBlueprintCompileReinstancer. ...
Navmesh generation doesn't work with Retopologize tool
UE - AI - May 15, 2018When a Landscape is edited with the Retopologize tool, Dynamic Navmesh is no longer generated. This was also tested with Static Navmesh and yielded the same results. ...
When changing a variable of a component in an attached Actor, the variable becomes read-only
UE - Gameplay - Aug 1, 2018Changing a variable of a component with an instance of BP derived from StaticMeshActor or SkeletalMeshActor attached to another actor will cause that variable to be read-only. It did not reproduce w ...
CreateProxyObjectForPlayMontage does not report if cannot play
UE - Anim - Rigging - Nov 15, 2018UPlayMontageCallbackProxy::CreateProxyObjectForPlayMontage creates a proxy object and immediately calls PlayMontage. If the montage fails to play (no mesh component, no animinstance, Montage_Play it ...
Niagara Ribbons using Two Sided materials are incorrectly lit
UE - Niagara - Apr 15, 2019Two Sided materials are lit incorrectly on Niagara ribbons. The sides will be flipped of how they should be. ...
UDistributionFloat member resets to null upon Blueprint Compile
UE - Gameplay - May 14, 2019A UDistributionFloat property is reset to NULL when compiling a Blueprint sub-class of a C++ class that has a UDistributionFloat property. ...
Skeletal Meshes have physics collisions lag
UE - Simulation - Physics - Oct 2, 2019Skeletal mesh's physics collision lag behind the actual mesh. It didn't matter if there was just a root bone or multiple bones/constraints. This doesn't happen when using static meshes. The effect ...
Undoing keyframe addition in Sequencer unselects actors in the Outliner
UE - Anim - Sequencer - Sep 8, 2025When a keyframe is added to a track in the Sequencer, undoing the operation correctly removes the keyframe, but it also unselects the actor. This becomes especially inconvenient when multiple actors ...