Reroute nodes in blueprints cause visual issues for events when using create event.

UE - Gameplay - Jul 25, 2016

When adding a reroute node between a "create event" node and any "Bind Event to...." node, the combo box list in "Create Event" node will disappear. Workaround: If the "create event" node is first ...

Vertex Interpolator causes depth-test to fail

UE - Graphics Features - Apr 23, 2020

Vertex interpolator (semi-randomly) causes visual artifacts on meshes. This did not happen initially when using or creating this material function but started about 24 hours later but now happens st ...

ModifiedDelegate and SaveDelegate in FSettingsSection are not always executed when a config value is changed

Tools - Feb 22, 2018

The comments describing ModifiedDelegate and SaveDelegate in FSettingsSection seem to indicate that the delegates should be executed after the settings section has been modified or should be saved. ...

Dragging a custom event node to event graph that is bound via output pin to an event dispatcher crashes editor

UE - Gameplay - Blueprint - Aug 3, 2016

Editor crashes if a custom event function is called after a custom event has been bound to an event dispatcher. However, this only occurs if the event binding occurs from an event delegate by ref ou ...

NvEnc API creation failed in 4.24.1 with M60 card on AWS EC2 instances.

PixelStreaming - Dec 24, 2019

i had an AWS EC2 g3.4xlarge instance(Nvidia M60 card).  I could run 4.22 packed PS application correctly. When switching to 4.24.1, I got the following error when trying to start the application wit ...

Viewport deselect hotkey no longer works

Tools - Dec 26, 2014

BRANCH: MAIN CHANGELIST: 2374441 PLATFORM: Windows DESCRIPTION: The functionality to use the hotkey to deselect an object in the viewport using the ESC key no longer works in 4.7 without first sel ...

Chaos : Rigid body sleeps when very small external force is applied by AddForce

UE - Simulation - Physics - Solver - May 25, 2022

When a small external force is applied to the rigid body, the VSmooth value is reset in the ResetVSmoothFromForces function. Since this function ignores the current velocity, a very small velocity ...

Get unexpected surface normals result while using TextureBasedMorph

UE - Graphics Features - Jan 11, 2018

Meshes that animate via vertex deformations using worldposition offset display incorrect surface normals while animating. The reflections of the environment smear as the mesh moves making it look tr ...

Compile error in ShadowDepthVertexShader.usf if INTERPOLATE_POSITION

UE - Graphics Features - Oct 21, 2015

Shader compile error in function PositionOnlyMain() in ShadowDepthVertexShader.usf if defined INTERPOLATE_POSITION. LogShaderCompilers:Warning: 1 Shader compiler errors compiling WorldGridMaterial ...

Undo/Redo can cause the gizmo to desync from a leaf-selected component

UE - Editor - Workflow Systems - Oct 18, 2021

This is a regression from 4.27. This is happening because of the change to typed elements. UEditorEngine::PostUndo, when combined with the typed element changes causes the selection set to reorder ...