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 ...

All Vive Trackpad Inputs Send The Same Input

UE - Platform - XR - Jan 13, 2020

The vive trackpad inputs all read as the same input. Found in 4.24.1 Reproduced in 4.25 Main ...

Crash upon using EComparisonMethod as a variable in a struct

UE - Gameplay - Blueprint - Jul 17, 2017

Having a variable of the type EComparisonMethod inside of a struct causes the editor to crash. This could be due to the variable being as part of the Development folders in code. Attempting to repro ...

Packaging with Steam VR plugin disabled requires an IDE

UE - Platform - XR - Jul 20, 2017

Disabling the SteamVR plugin in a Blueprint-Only project causes the packaging process to require an IDE to complete, as it requires compilation. Regression?: Yes This did not occur in 4.16.2 Note: ...

Translucent Materials Receiving Incorrect Shadows in Forward Shading

UE - Graphics Features - Oct 2, 2018

Translucent Materials will receive incorrect shadows in forward shading. This is working as expected in 4.18 CL# 3832480 Found in 4.19 CL# 4033788, 4.20 CL# 4369336, 4.21 CL# 4408769, 4.22 CL# 4413 ...