Volumetric Lightmap Holes Appear Every Fifth Build

UE - Graphics Features - Sep 11, 2018

Volumetric lightmap holes appear every fifth build.  Found in 4.19 CL# 4033788, 4.20 CL# 4302132, and 4.21 CL# 4348893 ...

Loading cooked shaders in editor is broken

UE - Graphics Features - Sep 10, 2018

Issue was traced to CL4018267. Shader hashes are not preserved during cooking anymore. This is failing the check in void FShader::Register() { FShaderId ShaderId = GetId(); check(ShaderId.Materi ...

Debug Helpers no longer drawn indefinitely if life time is set to 0 or less

UE - Graphics Features - Sep 10, 2018

Setting the lifetime for one of the visual debug helpers (a sphere was used in the repro, but the results should be similar for any of the debug helpers) to a value of 0 or less should make the debu ...

VR Motion Controllers: Haptic Feedback Effect SoundWaves

UE - Platform - XR - Sep 10, 2018

Attempting to play Haptic Effect SoundWaves on both Motion Controllers will cancel or interfere with each other. Tested with Oculus Also confirmed in Main 4348893 ...

Large UMG Blueprint widget trees can lead to very long compile times when packaging with Blueprint nativization enabled.

UE - Gameplay - Blueprint - Sep 10, 2018

Licensee reports very long C++ compile times during packaging after nativizing a UMG Blueprint asset containing a very large and heavily-nested widget animation hierarchy. The support thread outlin ...

BP new Event Dispatcher cannot be deleted after modification

UE - Gameplay - Blueprint - Sep 10, 2018

Changing the variable type of an Event Dispatcher in the Blueprint editor results in an impossible to compile situation. The BP must be then recreated due to being unable to remove the unattached ev ...

Double-Sided Geometry Collision Doesn't Work When Using Set Physics Linear Velocity

UE - Simulation - Physics - Sep 10, 2018

Double-sided geometry collision doesn't work when using physics set linear velocity. This does not occur when using floating pawn movement or character movement components. Working as expected in 4 ...

Support for 16-bit precision for positions in vertex buffer

UE - Graphics Features - Sep 7, 2018

Add support for 16-bit per component format for POSITION in vertex buffers as an option. Half-precision is already supported for UVs and TANGENTS on a per model basis, and was hoping that this woul ...

Spawned actors with meshes become invisible in editor after changing level

UE - Graphics Features - Sep 7, 2018

When moving actors spawned from within the editor to a new sublevel, their meshes stop rendering. However, if you open a new level then re-open the old level the meshes become visible again. You wil ...

Disallow assigning external textures to Slate widgets

UE - Editor - UI Systems - Slate - Sep 7, 2018

External textures cannot be directly assigned as a brush texture; you need to assign a material that samples from an external texture instead since it generates special shader code to access it. ...