Crash after playing using FX.AllowGPUParticles during play

Rendering - Cascade - Jul 6, 2018

If user use "FX.AllowGPUParticles 0" during play, a crash will occur after the play ends ...

Crash Occurs When Opening a Second Sequence After Altering the First While Simulating in Editor

Sequencer - Jan 30, 2018

-When opening a second sequence after altering the one prior(locking and unlocking the camera) while simulating in the editor, leads to a crash -Did not occur in 4.19 Preview 1 -As for the link to ...

Lighting Build Fails With High Density Foliage

Tools - Foliage - Jan 16, 2018

Trying to build lighting on a map with high density foliage will fail lighting build or cause the editor to crash. This occurs in 4.15, 4.16, 4.17, and 4.18. There have been multiple reports of this ...

Get unexpected surface normals result while using TextureBasedMorph

Rendering - Jan 11, 2018

Meshes that animate via vertex deformations using worldposition offset display incorrect surface normals while animating. The reflections of the environment smear as the mesh moves making it look tr ...

External textures don't render correctly on BSP

Media Framework - Jan 8, 2018

The result can be somewhat improved by setting different scale values in the surface properties, but it's always more or less broken. ...

Translucent Materials and Atmospheric Fog Appear Black or Pink on Mac

Rendering - Jan 3, 2018

I tested this on a Mac Pro in UE 4.15, 4.16, 4.17, and 4.18. As a possible workaround for the fog issue, I've discovered that setting Atmospheric Fog > Lighting > Disable Ground Scatter to "True" wi ...

Replace references doesn't prompt to save dirtied assets that hold a soft reference to the deleted asset

Gameplay - Dec 21, 2017

When deleting an asset any other asset that holds a soft reference to the deleted item will appear in the reference list. For a soft reference when choosing to replace the references with another as ...

Custom iOS icons don't appear using BP projects [4.18.2]

Platform - Mobile - Dec 14, 2017

So far this has been tested on Mac deploying SunTemple to an iPhone 7 (10.3.3). It occurred with both Launch On and File Package. This does not occur when deploying StrategyGame from the same Mac t ...

Nvidia In-Game Overlay causing FPS Issues

Rendering - Dec 14, 2017

When the Nvidia In-game overlay is enabled it appears to cause performance issues with the editor. If the editor is open before the overlay is enabled it does not seem to cause any issues. I stumble ...

Image widgets need to be invalidated (once) before material parameter can cause changes

Tools - UMG - Dec 11, 2017

The cache for images inside of an invalidation box needs to be invalidated at least once before changing a parameter that is applied to the material of the image will have an effect. ...