Niagara GPU particles will always have a lifetime of one second if they use a Collision Module

UE - Niagara - May 2, 2019

GPU Particles will always have a lifetime of one second when using a collision module. This is a result of an issue with how off screen timing is handled. GPU particles that are off screen should on ...

Crash on RTX Laptop with ray tracing and -d3ddebug

UE - Graphics Features - Lumen - May 1, 2019

Editor is crashing with d3ddebug in ray tracing Does not occur in dx12 without ray tracing Does not occur on a desktop PC with a 2080 Does not occur without d3ddebug ...

Editor freezes on RTX laptop in DX12 mode

UE - Rendering Architecture - RHI - May 1, 2019

Editor is freezing on RTX laptops with ray tracing Originally reported by Florian Dirmhirn Does not occur in dx12 without ray tracing Does not occur on a desktop PC with a 2080 I have not managed ...

Niagara Components can unregister themselves in the process of component registration

UE - Niagara - May 1, 2019

Spawn system attached with a system where bAutorDestroy is true and one data interface is invalid will crash the engine. ...

Skeletal Meshes load unused textures into memory from hard referenced assets. (Skeleton, Physics Assets)

UE - Foundation - Core - UObject - May 1, 2019

Physics Assets & Skeletons referenced by the skeletal mesh will load materials & textures from their default skeletal meshes into the statistics window. Either the statistics window is incorrect abo ...

Arabic characters not showing correctly when using some text based widgets

UE - Editor - UI Systems - May 1, 2019

Arabic characters do not appear to render correctly in text widgets and text box (Multi-line). They instead appear as box like character with the word "Arabic" and a random set of numbers and letter ...

Gaps/holes can appear in LODs that were generated in the editor

UE - LD & Modeling - Modeling Tools - Mesh Editing - May 1, 2019

When generating LODs in the editor some meshes can appear to have tears/ holes ...

PVehicleDrive not null-ed in UWheeledVehicleMovementComponent::OnDestroyPhysicsState

UE - Simulation - Physics - Apr 30, 2019

PVehicleDrive is not null-ed during OnDestroyPhysicsState, which can lead to crashes during future function calls. ...

[Feature Request] Controller Input fires in both packaged build and editor at the same time

UE - Editor - UI Systems - Slate - Apr 30, 2019

Editor still receives input if a packaged game is being run on the same machine. ...

"Invalid resource entry creating uniform buffer" when running Vulkan on Mobile

UE - Platform - Mobile - Apr 30, 2019

Android projects in 4.22.1 crash on launch with Vulkan enabled. Did NOT reproduce in 4.23 MAIN at CL 6156332 4.22.1 release CL is the same as a related fix for this ( [Link Removed] )  ...