Lighting build fail due to failing to open channel for material data

UE - Graphics Features - Apr 21, 2017

Licensee reports lighting build fails for their specific levels which were created in 4.14.1 then moved to 4.15.1. Workaround: Setting LogLightmassSolver verbose level to Warning can show "Warning ...

[CrashReport] Crash on Mac related to cooking for Android - libstdc++.6.dylib!std::_Rb_tree_rotate_left()

UE - Platform - Mobile - Jun 23, 2017

This is a common crash on Mac that has occurred since at least 4.12.5. It seems to occur during converting textures while cooking for Android. Callstack from LogLogCook:Display: Cooking /Engine/En ...

No device profile detection for iPad Pro 10.5"

UE - Platform - Mobile - Aug 1, 2017

There's no device profile for iPadPro 10.5". It picks up other rendering settings properly from the iPadPro family. ...

"Find Collision UV" does not work with "Get Hit result under cursor"

UE - Simulation - Physics - Jan 8, 2018

The Hit result from "get hit result under cursor" does not appear to be working with "find collision UV" Using "Line Trace by Channel" hit result works as intended. ...

Difference rendering result between SceneCaptureComponent2D and SceneRendering

UE - Graphics Features - Feb 14, 2018

This problem is difference rendering result between Final Image of SceneCaptureComponent2D and scene rendering. If I disable the post effect, the result seems to be the same, but turning it on will ...

Assertion failed: UnscaledViewRect.Width() > 0

Tools - May 23, 2018

Crash when using new FCanvasDrawer Licencee notes that crash does not occur if "new FCanvasDrawer" is commented out. ...

Scale is 0.0f when editing a curve with Animation Sequencer.

UE - Anim - Runtime - Jun 6, 2018

There are conditions. ・EnableRootMotion is true. ・Adidive Anim Type is Mesh Space or Local Space. https://udn.unrealengine.com/questions/436446/%E7%89%B9%E5%AE%9A%E6%9D%A1%E4%BB%B6%E3%81%AE%E3% ...

Animated Cube is at bind pose at the first frame of render

UE - Anim - Sequencer - Oct 16, 2017

Noticing that the location of the animated cube is not in the expected location on the first frame when rendering it out. Looking into that I noticed that I could reproduce it by going outside of th ...

Vertex Interpolate Node Doesn't Work with Lightmass

UE - Graphics Features - Lumen - Aug 8, 2018

The vertex interpolate node doesn't work with lightmass. Found in 4.19 CL# 4033788, 4.20 CL# 4233996, and 4.21 CL# 4258917 ...

[CrashReport] UE4Editor_MediaAssets!UMediaPlayer::GetPlaylistRef() [mediaplayer.h:890]

Media Framework - Jul 19, 2018

Comment from user:double clicked on a media player asset that I just cloned 880 /** 881 * Get the current play list. 882 * 883 * @return The play list. 88 ...