Unreal Engine Issues
Unreal Engine Issues
Soft angular constraints solve velocity like hard constraints
UE - Simulation - Core - Jul 17, 2025Soft angular constraints are solving velocity like hard constraints. Instead of swinging back and forth, the affected body just snaps to 45 degrees. Check the steps to reproduce for more details. Th ...
The Merge Actors Tool doesn't account for rotated collision shapes when doing non-uniform scaling
UE - Gameplay - Aug 30, 2016Collision shapes for merged actors using the Merge Actor tool do not account for the rotation of the actor when combining the data. It looks like the X and Y collision shape rotation in the world ...
Planar Reflections do not appear to cull based on the view frustum
UE - Graphics Features - Oct 27, 2016View Frustum and Occlusion culling do not appear to work for Planar Reflections though the stats in PIE seems to indicate otherwise. I've attached two gifs showing View Frustum and Occlusion chec ...
Execute Console Command r.SetRes Fullscreen breaks Dynamic Skylights when tied to Event BeginPlay
UE - Graphics Features - Apr 6, 2017Using the Execute Console Command 'r.SetRes 1920x1080f' directly with an Event BeginPlay node within blueprints, any Stationary/Movable Skylighting information is no longer visible. A simple workar ...
Indirect Lighting Cache causes Flickering on Skeletal Meshes
UE - Graphics Features - Apr 30, 2017Indirect Lighting Cache is causing the Indirect Lighting for Skeletal Meshes to flicker. I have attempted both ILCQ Volume and Point cache qualities, and it seems Point produces the most exaggerate ...
[CrashReport] UE4Editor_Engine!UEdGraphPin::Modify() [edgraphpin.cpp:619]
UE - Gameplay - Blueprint - Aug 29, 2017This is an infrequent crash coming out of the 4.17 release. User DescriptionsNICE PIN FIX NOW I CANT ADD VARIABLES NORMALLY Source Context 612 void UEdGraphPin::SerializeAsOwningNode(FArch ...
Replication issues & warnings if a client hitches while the server seamless travels
UE - Networking - Jul 28, 2020If a client hitches while a server performs a seamless travel, the client will get multiple lines of logspam of these warnings:Warning: UActorChannel::ProcessBunch: SerializeNewActor failed to find/ ...
Skeletal mesh reduction - Material settings are lost when regenerating the LOD in a mesh with a reduced material section
UE - World Creation - Worldbuilding Tools - HLOD - Nov 25, 2020Following code fixes this issue in FQuadricSkeletalMeshReduction::ReduceSkeletalMesh Section.ChunkedParentSectionIndex = bIsChunkedSection ? CurrentParentSectionIndex : INDEX_NONE; // ...
Final Gather Quality Post Process setting causes severe rendering issues in the Stack-O-Bot project
UE - Graphics Features - Lumen - Feb 24, 2022When opening the Stack-O-Bot project in 5.0 Preview 1, the project has a rendering issue where bright shimmering lights appear all around the screen. I discovered that this is due to the PostProcess ...
CreateDynamicMaterialInstance will pull from the base rather than overridden mesh on SkinnedMeshComponent when run from construction script
UE - Framework - Blueprint - Feb 6, 2025When UPrimitiveComponent::CreateDynamicMaterialInstance is called on a skinned mesh, and the input material is invalid, we call USkinnedMeshComponent::GetMaterial to get the base material on the exi ...