Exceptions can no longer be enabled for ProjectEditor targets

DevTools - Jul 16, 2018

It is no longer possible to enable C++ exceptions for the ProjectEditor target in code projects that use the binary Engine. Some fixes that were made for 4.19 now correctly show an error message if ...

'Set Timer by Function Name' not able to call functions that return an Output Parameter

Gameplay - Jul 16, 2018

When using a 'Set Timer by Function Name' node with a Function that has an Output parameter it will fail at executing the Function. If the Function is called with an Event BeginPlay node it will fu ...

When "Support Material Layers" is Enabled Material Instance Parameter Values Reset to Default Value When Override is Unchecked

Rendering - Jul 14, 2018

If "Support Material Layers" is enabled, every time you uncheck an overridden parameter box in a material instance the value of that parameter will reset to its parent's default value instead of sta ...

Niagara Particles don't work with Instanced Stereo Rendering enabled

Rendering - Niagara - Jul 13, 2018

With Instanced Stereo enabled, CPU Niagara particles are not visible, GPU Niagara particles render in left eye only. ...

Packaging fails during compilation when nativizing a blueprint using ForEach and ByteTo with a custom enum type

Gameplay - Blueprint - Jul 13, 2018

When using Blueprint Nativization, the compilation will fail during packaging when using a ForEach loop or ToByte conversion with a custom enum in a TMap. Regression?: No This occurs in 4.18 ...

Niagara Not Working with Volumetric Materials

Rendering - Niagara - Jul 13, 2018

Niagara will not work with Volumetric Materials. Found in 4.20 Preview 5 CL# 4173640 and 4.21 CL# 4207835 ...

Importing an Alembic File with "Skip Empty Frames at Start of Alembic Sequence" Enabled Causes Crash

Anim - Jul 13, 2018

Importing an Alembic File with "Skip Empty Frames at the Start of Alembic Sequence" Enabled Causes Crash. Found in 4.20 Preview 5 CL# 4173640 and 4.21 CL# 4207835 ...

Cursors: 'Grab Hand' and 'Grab Hand Closed' appear as 'Hand' in packaged project

Tools - Slate - Jul 13, 2018

GrabHand Cursors appear as Hand (Index finger cursor) in a packaged project 4.20p5 CL# 4173640 4.21 CL# 4179764 ...

Setting CrowdManagerClass via Project Settings doesn't work

Gameplay - AI - Jul 13, 2018

Due to the way we pick CrowdManagerClass at runtime (see UNavigationSystemV1's constructor) whatever is being set via project settings is ignored. ...

Input not recognized from 'Any Key' when set as an Action Mappings Binding

Gameplay - Jul 12, 2018

The 'Any Key' input isn't working when it is assigned in the Axis Mappings menu. If you call 'Any Key' in Blueprint it still functions as intended. This is a regression from 4.19.2 (CL-4033788). T ...