Unreal Engine Issues
Unreal Engine Issues
Multicast RPC from PlayerController with RepGraph results in an invalid swap message
UE - Networking - Mar 4, 2021Since a player controller only exists on the server and on the owning client, calling a multicast from one isn't really a supported operation. However, this case is still handled cleanly when RepGra ...
Using Custom Primitive Data as Final Colour in a UI Material crashes the engine with a missing uniform buffer
UE - Rendering Architecture - Materials - Jul 3, 2024Using custom primitive data as an input in a UI material causes the engine to crash in the RHI thread. The exact crash is "Missing uniform buffer at slot 1, stage SF_Pixel." at Engine\Source\Runtime ...
UV merging issue when merging meshes with multiple materials
UE - LD & Modeling - Modeling Tools - Mesh Editing - Jul 15, 2019See https://udn.unrealengine.com/questions/505632/view.html for more details Repro: -Have a mesh with 3 sections and 3 materials, assign section 1 to material 1 and section 2&3 to material 3. -Pla ...
GameplayTag Query on Component Instance resets when reloading level
UE - Gameplay - Components - Jun 14, 2018GameplayTagQuery variables - when inside of a component, are not saved. User notes: "Note that this does not occur if the ActorComponent is added in code in a native actor and that the actor at S ...
Oculus Touch Menu Button Input Not Received When Set In Action Mapping
UE - Platform - XR - Mar 9, 2020The left menu button on Oculus Touch doesn't have it's input received when it is assigned to an action mapping. This looks like it stopped working after SteamVR was integrated into the engine. Foun ...
[CrashReport] UE4Editor_UnrealEd!SaveWorld() [filehelpers.cpp:359]
Tools - Aug 31, 2016This Jira was created from CrashReports submitted by the public due to the high number of occurrences. Descriptions from users are provided below. Error message: Assertion failed: !bIsReentrant [L ...
Imported animation has one more frame than the original fbx
OLD - Anim - Jul 19, 2016In UE4.12, imported animation has one more frame than the expected frame number. AS_AN_StepAnim_Test.fbx is 60 frame long animation(starts at frame 0, ends at frame 60). When imported to UE4.12, it ...
STAT_AI_BehaviorTree_InstanceMemory is sometimes wildly inaccurate
UE - AI - Jun 10, 2020From the UDN thread: Turns out this is caused by the way this stat was implemented for the FBehaviorTreeInstance struct: 1) You call IncMemoryStats on construct, before the struct is populated with ...
Video material previews incorrectly on Mac
TM - Rendering - Apr 3, 2025Received multiple reports of users on Mac computers experiencing issues previewing video materials in Twinmotion 2025.1. When adding video materials to the scene, the scale seems to be incorrect an ...
Stationary and Movable Skylight with reflection captures in Forward Rendering have inverted capture for geometry
UE - Graphics Features - Oct 25, 2016When using a Stationary or Movable Skylight with some reflection captures that are not using the High Quality Reflections (material setting) will have what appears to be an inverted mask for the ref ...