Unreal Engine Issues
Unreal Engine Issues
Server doesn't process anim notifies with montage tick type set to queued when bad network conditions occur
UE - MVF Character - Animation - May 3, 2023After some testing this issue looks to only occur with queued notifies and not with branching point notifies. UDN: https://udn.unrealengine.com/s/question/0D54z00009643x4CAA/server-doesnt-process-a ...
Mass is not calculated if an object's Collision Enabled field is set to No Physics Collision even when Simulating Physics
UE - Foundation - Core - May 22, 2015If an actor has 'Simulate physics' enabled and the Collision Enabled field is set to anything other than Collision Enabled (i.e. OverlapAll sets this to No Physics Collision) then mass is reset to 1 ...
RenderTarget Texture Alpha rendered incorrectly when SceneCapture2D AA set to true
UE - Graphics Features - Jan 8, 2016The Alpha Channel of the Render Target Texture is rendered as a value of 1 (solid white) when the SceneCapture2D actor is set to LDR with PP and Anti-Aliasing is set to true in the General Show Flag ...
Rigidbody not moving when small force is applied, and only rotates when angular impulse ≥ 7
UE - Runtime - Simulation - Jan 3, 2023Reproduced 3/3 times, issue also occurs in //UE5/Release-5.0 - CL 20979098 Binary. Confirmed NOT a Regression. ...
Issue with r.SkyAtmosphere.TransmittanceLUT.UseSmallFormat
UE - Rendering - Features - Mar 30, 2026When "r.SkyAtmosphere.TransmittanceLUT.UseSmallFormat=1", some values for the Sky Atmosphere at some directional light angles can lead to the sun disk being cut off, and taking on a chord shape. A ...
CharacterMovement doesn't clear velocity
UE - Runtime - Simulation - Oct 11, 2024Velocities are not being cleared when physics simulation set to false. ...
[Quartz][Device Swap] - Quartz Clock Stops when swapping Audio Output Device
UE - Audio - May 2, 2022When swapping the audio output device while running PIE or a packaged game on Windows, Quartz clocks stop. Does not repro in Release-4.27, but can be reproed in Release-5.0. ...
Skeletal Meshes keep reference to unused Material IDs
UE - Editor - Content Pipeline - Import and Export - Sep 7, 2016When importing a FBX with multiple materials and some of them are unused from their setup, they will still be referenced by the skeletal mesh in the Details Panel in the level editor, but in the Per ...
Chooser Table does not support binding Gameplay Tag properties
UE - Runtime - Animation - Sep 15, 2025When using Chooser Tables, the Gameplay Tag type cannot be bound through the column header UI. Clicking a column header for a different property (ie: bool or float) correctly shows the binding popup ...
Crash trying to convert skeletal mesh to Nanite
UE - Rendering - Features - Nanite - Mar 6, 2025In SkeletalRenderNanite.cpp / FDynamicSkelMeshObjectDataNanite::UpdateBonesRemovedByLOD, bone indices are of type FBoneIndexType (defined as uint16 from BoneIndices.h), instead of int32. On line 18 ...