Ribbon particles moving fast are inconsistent in initial position.

Rendering - Cascade - May 21, 2019

The fast-moving ribbon particle trail looks different on the server and client. It looks as though the client was drawing the previous frame. ...

SceneCapture2D Component Show Flags that are Modified in a Blueprint initially are Copied not Referenced

Rendering - May 17, 2019

If you disable show flags in a SceneCapture2D component of a Blueprint, trying to re-enable them in the Blueprint will not update instances in a level. Anything that was left alone will change along ...

Rotate child relative to parent and a grandchild or great grandchild will leave collision box behind

Physics - May 15, 2019

The collision with meshes appear to be broken in relation to parent and a grandchild or great grandchild collision boxes. ...

High-Poly Meshes with DistanceToNearestSurface is Completely White

Rendering - May 14, 2019

The distance field materials do not work on a High Poly mesh.   Found in 4.19 CL# 4033788, 4.20 CL# 4369336, 4.21 CL# 4753647, 4.22 CL# 6063286, 4.23 CL# 6398642 ...

UDistributionFloat member resets to null upon Blueprint Compile

Gameplay - May 14, 2019

A UDistributionFloat property is reset to NULL when compiling a Blueprint sub-class of a C++ class that has a UDistributionFloat property. ...

Actors with large numbers of components cause long hitches during cooking

Core - Cooker - May 14, 2019

Actors with large numbers of components cause long hitches during cooking. Here is a brief profile from Very Sleepy of the process while the editor was cooking: [Image Removed] ...

Mesh and Preview Character BP Stuck in "In Air" Animation

Gameplay - Player Movement - May 13, 2019

Checking the Run Physics with No Controller box in an animation Blueprint causes the Mannequin to change over to the "In Air" animation state. This will only occur after making the change then compi ...

Procedural Foliage Volume: Simulate() function doesn't work in Blue Print

Tools - Foliage - May 10, 2019

Procedural Foliage Volumes can be resimulated by clicking the Resimulate button. But they can't be resimulated from Blueprints, even if there is a Simulate() function that can be executed. Found in ...

Actor Component gets displayed above Scene Component when making a new root

Gameplay - Components - May 10, 2019

Making a scene component the new root component results in the actor component being displayed above the scene component hierarchy ...

Scrubbing Animation Timeline in Montage does not trigger sound notifies.

Anim - May 9, 2019

Scrubbing an Animation Timeline within a Montage does not play a sound for Anim Notifies that specify "Play Sound." ...