Opening map assets from "Open World Demo Collection" causes engine to freeze

Docs - Samples - Mar 9, 2020

Opening map assets from the "Open World Demo Collection" sample results in the engine freezing. No crash occurs, just a lock up of the engine at 75%. There is the possibility that it could take s ...

Animating the camera and character with LiveLink makes the character tremble

UE - Virtual Production - Mar 31, 2020

GIF images are attached. The animation is smooth on the MotionBuilder side, but it is "slightly" wobbly in UE4. The licensee reports that the situation can be heavily shaken by the situation. Also, ...

Incorrect AO rendering when that using SSGI.HalfRes

UE - Graphics Features - Apr 6, 2021

This problem seems to have started from 4.26. Also, setting r.DiffuseIndirect.Denoiser=0 will increase the noise but invisible the rendering in problem. ...

StaticMeshComponent occasionally doesn't simulate physics after SpawActor.

UE - Simulation - Physics - Aug 23, 2022

When spawning Pawns with a StaticMeshComponent with SimulatePhyscis=True, they occasionally may not simulate physics. This can be reproduced by simply repeating the respawn. The frequency of reprodu ...

Two planar reflection and translucent materials draw reflections on one side only

UE - Graphics Features - Jan 6, 2023

This problem seems to be fine when the material is Opaque.[Image Removed] ...

Global Distance Field Precision Issues Far From Origin

UE - Graphics Features - Jan 26, 2023

[Enduring] Appears to be in the visualization rendering of the distance field, distance field shadows were unaffected. There was one instance where the bug did not replicate as expected. This was wh ...

Blueprint Nodes no longer Grid Snap to straight lines

UE - Editor - Feb 13, 2023

5.0:[Link Removed] 5.3:[Link Removed] Attached is a video of the two screenshots overlaid and lined up by their top edges. It appears that the Begin Play node (and others?) have more padding now, w ...

Deferred spawned actors can receive BeginPlay before they are finished spawning

UE - Gameplay - May 18, 2023

Actors that are deferred spawned on BeginPlay can be added to the world while AWorldSettings::NotifyBeginPlay is still iterating the world's actors and dispatching BeginPlay. AActor::DispatchBeginPl ...