Stacked shots will evaluate both sub sequences instead of just the topmost

UE - Anim - Sequencer - May 19, 2021

Overlapping shots will evaluate all shots instead of the topmost one. ...

Handheld AR: Session fails to Start after minimizing/backgrounding the application

UE - Platform - XR - May 18, 2021

When the user minimizes or backgrounds an AR application, and re-opens it, new AR sessions will fail to start ...

InstancedStaticMesh displaying corrupt lightmap data

UE - Rendering - May 17, 2021

I think I narrowed this issue down to bad UV coordinates being interpreted during the BasePassVertexShader execution applied to instancing. At this line in VertexFactoryGetInterpolantsVSToPS: flo ...

Very thin meshes cause flickering with emissive materials.

UE - Rendering - May 13, 2021

The licensee has reported that when you make a mesh extremely thin (e.g. z = 0.0001), it can cause emissive materials applied to the mesh to flicker. ...

Crash when adding an Event Write node to a Niagara Scratch Pad module

UE - Rendering - Niagara - May 13, 2021

It seems that the crash is related to all of the "Write" events. I tested the Event ChaosDestruction Write, Event Float Write, and Event Bool Write and all 3 caused the crash, but their "Read" count ...

Fast Path pin update can break when anim BP compilation generates warnings

UE - Anim - Runtime - May 13, 2021

It seems that a Anim BP that generates a warning will break the updating of pins that are connected via fastpath in other parts of the graph. This was reported on the following UDN: [Link Removed] ...