Calling functions that have an implicit WorldContextObject parameter in a Blueprint function library will give a compile error about a missing __WorldContext pin

UE - Gameplay - Blueprint - May 21, 2015

Calling functions that have an implicit WorldContextObject parameter (line trace, execute console command, etc) in a Blueprint function library will give a compile error about a missing __WorldConte ...

Can't PIE or Save: Editor gets into odd state when editing parameters.

Tools - Jul 20, 2016

I've seen this happen in other areas of the editor as well: Data Table fields (floats) for example. Manually typing in numbers to fields seems less prone to this error; using spinners to drag value ...

DataAssets with a field called "Name" can cause multiple Name columns to appear in the content browser

UE - Editor - Content Pipeline - Content Browser - Jul 18, 2017

A DataAsset with a FText property called "Name" will confuse the content browser, causing it to create a new column each time the folder containing the DataAsset is entered. This appears to be a cor ...

Prompt for camera permissions when running Google VR plugin

UE - Platform - XR - Mar 7, 2018

Need to update these UDN threads when the issue is fixed. https://udn.unrealengine.com/questions/401360/ios-shipping-build-crash.html https://udn.unrealengine.com/questions/428225/about-ios-ship-b ...

Tiled Landscape LOD doesn't work with World Origin Rebasing

UE - LD & Modeling - Terrain - Landscape - Apr 26, 2018

Using the Landscape LOD system with World Origin Rebasing causes the LODs on the landscape to mess up. This only appears with imported tiled landscape where the main actor is in the persistent level ...

AssetManager does not correctly call delegates if bShouldUseSynchronousLoad is true

UE - Gameplay - Oct 3, 2018

There's a bug in UAssetManager::LoadAssetList where the passed in DelegateToCall is not being called in the bShouldUseSynchronousLoad case. This can cause gameplay logic to fail when that bool is tr ...

Billboard Component Flickers Between Textures When Using Set Sprite Node

UE - Graphics Features - Nov 8, 2018

When using a Set Sprite node with a billboard component, the texture assigned will flicker between the two possible textures. Working as expected in 4.20 CL# 4369336 Found in 4.21 CL# 4541578, 4.2 ...

Setting Lightmap Coordinate Index Past 3 Causes Mesh to Get No Lightmap Information

UE - Graphics Features - Nov 20, 2018

Meshes with their Lightmap Coordinate Index set to anything over 4 will not be lit by static or stationary lighting.  Found in CL# 4.19 4033788, 4.20 CL# 4369336, 4.21 CL# 4541578, 4.22 CL# 4573698 ...

Alpha Compression Artifacts

UE - Graphics Features - Nov 23, 2018

Confirmed in Main 4.22 @ CL 4586854 in 4.21 Alpha looks to be about 1 pixel larger than other channels in certain parts of the texture "The issue is not improved by changing compression settin ...

Editor Unable to Find Mali Offline Compiler On Mac

UE - Platform - Mobile - Dec 7, 2018

Material Editor is unable to find the Mali Offline Compiler on Mac. This inhibits you from looking at platform stats for Android. Working as expected in 4.20 CL# 4369336 Found in 4.21 CL# 4613538, ...