SpiralBlur - SceneTexture When Attached to Base Color Generates Compile Errors

Rendering - Apr 16, 2019

SpiralBlur - SceneTexture When Attached to Base Color Generates Compile Errors Found in 4.20 CL# 4369336, 4.21 CL# 4753647, 4.22 CL# 5660361, and 4.23 CL# 5908927 ...

Niagara Ribbons using Two Sided materials are incorrectly lit

Rendering - Niagara - Apr 15, 2019

Two Sided materials are lit incorrectly on Niagara ribbons. The sides will be flipped of how they should be. ...

Streaming Multiple Instances of the Same Landscape Actor All Have the Same GUID

Tools - Landscape - Apr 15, 2019

If a level contains a landscape actor, and if you stream multiple instances of that level into your map, you will get errors in the message log that the landscape actors have the same GUID. Found i ...

Editor Crash While Using "Snap to Floor" Shortcut on Some Foliage Instance.

Tools - Foliage - Apr 15, 2019

When pressing the End key to have a foliage mesh "snap to floor/surface" the editor will crash. Found in 4.21 CL# 4753647, 4.22 CL# 5660361, and 4.23 CL# 5898046 ...

IsPlayInMobilePreview does not return true when using Mobile Preview

Platform - Mobile - Apr 11, 2019

A user has reported that the IsPlayInMobilePreview function does not return true when playing in Mobile Preview. From looking at the function, it seems to be looking specifically for the commandline ...

Rotation of a constraint is not taken into account for limited range movement

Physics - Apr 9, 2019

Rotating a constraint does not update its range of motion based off of angular limits. The user who reported this also mentioned that migrated constraints do not see this issue (eg: migrating a phys ...

LOD of Texture on Static Mesh is selected incorrectly when spawned in Sub-Level loaded by Level Streaming

Rendering - Apr 9, 2019

LOD of Texture on Static Mesh is selected incorrectly when spawned in Sub-Level loaded by Level Streaming. This issue does not occur with Editor play, only with Launch or Packaging and Play. Accordi ...

RF_WasLoaded is set to False in PIE for instances of a Blueprint if the Blueprint is recompiled

Gameplay - Blueprint - Apr 5, 2019

The RF_WasLoaded flag is set to false for Blueprint instances in PIE if the Blueprint is edited and compiled. This is fixed by saving the level which is a simple workaround but this should be needed ...

Landscape: When updating Physic Material on a landscape layer info object, the physic material is not propagated correctly

Tools - Landscape - Apr 4, 2019

This will result in not getting the Phys Material when doing collision query. Info from the UDN "Having stepped through the ULandscapeLayerInfoObject::PostEditChangeProperty I can see that the U ...