Creating loaded world with LoadLevelInstance fails when PIE is executed.

Gameplay - Jul 10, 2018

Loaded level defined in TSoftObjectPtr <World> fails to load with LoadLevelInstance. This is due to "UEPID" prefix. Because it is rewritten by FSoftObjectPath :: FixupForPIE (), retrieval of Object ...

Rect Lights does not illuminate Volumetric Fog except at extreme intensities

Rendering - Features Teams - Jul 9, 2018

Rectangular Area Lights require extremely high values in order to illuminate Volumetric Fog and Volumetric Materials. This means they do not appear to match the output of other light types of identi ...

Startup Movie renders as a black screen on some Android devices

Platform - Mobile - Jun 29, 2018

While testing on the 10661_Xiaomi Mi 5C the Startup Movie would occassionally render as a completely black screen while still playing the audio from the Startup Movie sample. This was the most consi ...

Error during packaging if nativizing a blueprint that contains a TMap with TSubclassOf as a key

Gameplay - Blueprint - Jun 28, 2018

Packaging with with a nativized blueprint that contains a TMap with a TSubclassOf pointer as a Key causes errors, causing the packaging attempt to fail. Regression?: No Compiling the code for the T ...

[CrashReport] UE4Editor_Core!FArchive::SerializeCompressed() [archive.cpp:696]

Core - Jun 12, 2018

No user comments in crash group 686 // Iterate over all chunks, serialize them into memory and decompress them directly into the destination pointer 687 for( int64 ChunkIndex=0; ...

Fog Does Not Behave As Expected in Splitscreen

Rendering - May 25, 2018

This bug seems to repro very inconsistently for me, but I've seen it affect Atmospheric Fog and Exponential Height Fog, and reproduced in 4.18.3, 4.19.2, and Main CL 4093338. I've attached Config fi ...

Dynamic Input and Function Scripts fail to compile by default

Rendering - Niagara - Apr 4, 2018

All Niagara Scripts are uncompiled by default. This has been logged (UE-66593). Compiling the script resolves the warning noted in 66593 for Module and Function Scripts. Dynamic Input Scripts, howev ...

Cascade Particles with Module Collision do not behave correctly (die) when colliding with plane in PIE

Rendering - Cascade - Apr 3, 2018

Cascade Particles with Module Collision do not behave correctly (die) when colliding with plane in map QA-Effects example 1.2. I've included a gif showing the issue Particles.gif[Image Removed]. T ...

Tessellation not working properly on Vulkan

Rendering - Jan 25, 2018

When a user launches content examples with -vulkan tessellation will not be working. Everything tessellated will appear as if it has no tessellation. This issue is also occurring in 4.18 ...