Niagara Using a VAT has Intense Motion Blur

UE - Niagara - Jun 3, 2019

Niagara mesh particle using a VAT has Intense Motion Blur. Found in 4.22 CL# 6574378 and 4.23 CL# 6763247 Unable to test this in 4.21 and 4.20 as the project provided with assets needed was made i ...

Shader Complexity viewmode does not work on masked materials

UE - Graphics Features - Oct 16, 2019

In engine versions 4.23 and above, the Shader Complexity Viewmode doesn't render appropriately for meshes with masked materials. Tested in 4.22.3 (CL - 7043647), 4.23 (CL - 8386587), 4.24 (CL - 961 ...

Crash When Opening a DataTable Based Off a Struct With a Timecode Variable

UE - Anim - Sequencer - Mar 30, 2020

When a datatable is based off a struct with a timecode variable it will crash when opening. Found in 4.24.3 CL#11590370 Reproduced in 4.23.1 CL#9631420, 4.25 Preview 4 CL#12366721, 4.26 CL#12123513 ...

PerInstanceRandom does not work on Instanced Static Meshes spawned at runtime

UE - Graphics Features - Aug 11, 2017

PerInstanceRandom does not provide a random value when the material is being used on an Instanced Static Mesh that is spawned at runtime, the value is always the same. Regression?: Yes This did not ...

Initial Modules are clamped to a 0 to 1 time range

UE - Graphics Features - Sep 18, 2015

The Initial Modules appear to be clamped to a zero to 1 time frame since 4.8 was released. Projects that are converted from 4.7.6 will have correctly working particle systems, but adding a new part ...

Duplicating a SetMaterialAttributes Node Causes Missing Attributes

UE - Rendering - Architecture - Materials - Nov 5, 2018

Duplicate SetMaterialAttributes nodes will be missing attribute connections on the node itself, but in the properties tab they will show up. Found in 4.19 CL# 4033788, 4.20 CL# 4369336, 4.21 Previe ...

Crash trying to delete an actor after undo/redo adding a component

Tools - Feb 1, 2017

Not a regression as it occurs in 4.14.3 ...

Server travel from Shooter Game level Highrise crashes editor

UE - Networking - Nov 17, 2014

If a person is on the Shooter Game level Highrse and uses the blueprint node "Execute Console Command" to server travel to any other level the editor will crash. In PIE mode the editor will hang at ...

Undoing the pasting of a copied node from the Blueprint Diff tools causes an access violation crash

UE - Gameplay - Blueprint Editor - Aug 24, 2017

The editor crashes with an Access Violation if a node that was copied and pasted from the Blueprint Diff tools is removed via an undo. Regression?: No This issue also occurred in 4.16 Branches tes ...

Display error when removing foliage instances in standalone or built game

UE - World Creation - Worldbuilding Tools - Foliage - Feb 12, 2018

This bug has different behavior depending on the engine version. When tested in 4.19 Preview 4, the 1M_Cube meshes do not render in the standalone/built game.   In 4.20, the meshes render but some m ...