Niagara Parameter Collection Overrides aren't working

Rendering - Niagara - Aug 20, 2020

Parameter collection overrides defined in the Niagara system's System Properties do not work. In FNiagaraSystemSimulation::GetParameterCollectionInstance the return value of GetParameterCollectionO ...

Media Player not updating when IMG Media Source files are changed

Media Framework - Aug 20, 2020

Images in a sequence path for an Img Media Source are not updating without restarting the project. Changing the path itself appears to work as expected.  Tested in versions 4.22.3(CL 7053642), 4. ...

Editor crashes when calling "Begin Draw Canvas to Render Target" on Event Tick

Rendering - Aug 20, 2020

The recent hotfix caused this workflow to begin crashing. User reports that it worked as intended in 4.25.2 (CL-13908680). We are unable to reproduce it in 4.24.3 (CL-11590370) either. Crash is ha ...

Changes to local project settings (Project/Saved) are not propagated to the default ini file upon using "Set As Default" if that file is currently checked-in/read-only

Tools - Aug 20, 2020

Changes to local project settings (Project/Saved) are not propagated to the default ini file upon using "Set As Default" if that file is currently checked-in/read-only. ...

CoreSymbolication.framework fails to load on macOS 11 Big Sur

Platform - Mac - Aug 20, 2020

CoreSymbolication.framework has moved, likely into the system library cache. The function, FApplePlatformSymbolication::EnableCoreSymbolication probably needs to be updated in order to accommodate.d ...

RetainerBox may cause memory leak

Tools - Slate - Aug 20, 2020

Essentially, this memory leak should be counted in the UI section, but it is counted in the SceneRender section. This seems to be due to the behavior of MemStackAllocator and FixedSizeAllocator. Th ...

Templated enum GetValueAsString function returns incorrectly formatted string

Core - Aug 19, 2020

For many years there has been a static function on UEnum called GetValueAsString which would convert an enum like EAttachmentRule::KeepWorld to the string "KeepWorld", if you passed in the explicit ...

Planar Reflections distorted if Separate Translucency Screen Percentage less than 100%

Rendering - Aug 19, 2020

Planar reflections with any value lower than 100 for SeparateTranslucencyScreenPercentage are skewed/distorted when moving the camera, not representing the correct image when the value is 100. ...

ObjectScale node in the material editor does not work with decals

Rendering - Aug 19, 2020

The ObjectScale node does not output the correct values in the material editor. This method works to tile images with a Surface Material Domain on a basic plane, but does not work when using it with ...

Merged actors cannnot cast shadows when source actors Cast Shadows is disabled

Tools - Merge Actor - Aug 19, 2020

Merging actors with cast shadows disabled causes the merged actor to be unable to cast shadows at all. Toggling the Cast Shadows option does not resolve the issue. This is seen in //UE4/Release-4.2 ...