Unreal Engine Issues

Particle Mesh Emitters Cause Heavy FPS Stutter

Per User: After updating my project from 4.18 to 4.19, I started getting huge FPS drops at regular intervals. I managed to trace back the issue to particle systems with mesh emitters and could repr ...

UMaterialBillboardComponent Memory Leak and Hitching (Unreal 4.19.2 + 4.19.1)

Creating an actor with a UMaterialBillboardComponent causes Editor hitching. ...

Per Poly Collision Does Not Update With Morph Target

Per poly collision does not update with morph targets. Occurs with per poly collision enabled in both skel mesh editors and in details of editor. Video from user can be found in project folder att ...

Atmospheric Fog Sun Disc Has Wrong Intensity

This behavior has been observed in 4.18.3, 4.19.2, and Main (CL 4048405). Note that adding  BP_Sky_Sphere to the scene and assigning the Directional Light Actor to it will fix the issue. Per User: ...

Atmospheric Fog Sun Disc Has Wrong Intensity

This behavior has been observed in 4.18.3, 4.19.2, and Main (CL 4048405). Note that adding  BP_Sky_Sphere to the scene and assigning the Directional Light Actor to it will fix the issue. Per User: ...

Editor crashes when duplicating a Blueprint instance whose parent class overrides PreEditChange() without including a call to Super

Attempting to duplicate an instance of a Blueprint in a level where the parent code class has overridden PreEditChange() without including a call to Super results in the Editor crashing. ...

Foliage Not Updating to Match New Landscape Height After Level Save-As

I have observed this behavior in 4.18.3, 4.19.2, and Main (CL 4048405) Per User: I made a landscape, painted some foliage and saved the scene. After I saved the same scene under different name the ...

VR billboard problems

https://udn.unrealengine.com/questions/429242/419-psvr-dynamic-resolution.html "We are experiencing a rendering regression in PSVR when upgrading from 4.17 to 4.19. A MaterialBillboardComponent tha ...

Update Actor will not update scene if object is deleted in original scene

Using CommutativeAssociativeBinaryOperator with a BlueprintPure function causes an ensure when adding the function to a Blueprint

A UFUNCTION that is BlueprintPure and has CommutativeAssociativeBinaryOperator set to true results in an ensure whenever it is shown in the Blueprint Editor. The reproduction steps cover adding the ...