Crash enabling Landscape Layers in editor with -Vulkan

UE - Rendering Architecture - RHI - Jul 19, 2019

The following fatal error occurs:[2019.07.19-19.41.13:425][975]LogWindows: Error: Fatal error: [File:E:/Workspaces/Main/Engine/Source/Runtime/RenderCore/Private/RenderingThread.cpp] [Line: 836] [2 ...

A Niagara system will only use one spawn rate curve when it has more than one emitter with different spawn rate curves

UE - Niagara - Jul 19, 2019

Systems that have more than one emitter that both have unique spawn rate curves will only used the most recently added emitter's spawn rate curve for all emitters. ...

Noise Node Fails to Compile With Voronoi Noise if Ray Tracing is Enabled

UE - Graphics Features - Jul 19, 2019

Noise Node Fails to Compile With Voronoi Noise if Ray Tracing is Enabled.  Working as expected in 4.22 CL# 7053642 Found in 4.23 Preview 2 CL# 7321677 and 4.24 CL# 7437539 This is a regression   ...

RestrictedToClasses UCLASS Meta expects space delimiters but documentation shows comma delimiters

UE - Gameplay - Jul 19, 2019

The documentation: https://docs.unrealengine.com/en-US/Programming/UnrealArchitecture/Reference/Metadata/index.html shows the RestrictedToClasses meta syntax as being RestrictedToClasses="Class1, C ...

Mobile Multi-View 4.23 preview regression

UE - Platform - XR - Jul 18, 2019

Black-screen when mobile-multi view is enabled in 4.23 preview.  Also confirmed on Oculus Go. +Occuring in 4.24 MAIN @ CL 7436536 Sidenote: In all tested engine versions - when enabling/disabin ...

Sharing Material shaders wastes memory and disappears from the memreport

UE - Graphics Features - Jul 18, 2019

Enabling bShareMaterialShaderCode breaks memory tracking and wastes memory due to issues in ShaderCodeLibrary. It is also worth noting that after cooking with bShareMaterialShaderCode enabled causes ...

Broken assignation of materials when merging meshes

UE - LD & Modeling - Modeling Tools - Mesh Editing - Jul 18, 2019

See the following UDN for a good visual explanation of the bug: https://udn.unrealengine.com/questions/512811/view.html Seems like this was introduced around CL 5639656. ...

ARSharedWorld, AREnvProbe, and ARSaveLoad fail to build for iOS with clang error

UE - Platform - Mobile - Jul 18, 2019

ARSharedWorld fails to package at the build command for iOS with the following messages. Packaging (iOS): [1/4] sh /Volumes/Storage/Workspaces/Release/Samples/AR/ARSharedWorld4.23/Binaries/IOS/ARS ...

When welding a procedural mesh component to a non-physics simulated static mesh that overlap they collide continuously

UE - Simulation - Physics - Jul 18, 2019

When attaching a Procedural Mesh Component with a copied static mesh to a static mesh component the two meshes collide and "push" each other (go flying on play). Weld is to be used for simulated ph ...

Translucent objects blink when using Vulkan with Kirin 970 device

UE - Graphics Features - Jul 18, 2019

Translucent objects ( e,g, effect, fog sheet ) blink when using Vulkan with Kirin 970 device. This issue doesn't occur on Vulan mobile preview, Snapdragon device, and Huawei honor 9(Kirin 960). ...