Wireframe Appears Aliased and Draws Behind the Editor Grid

UE - Graphics Features - Jan 10, 2019

When the Editor grid is enabled, it draws over the wireframe objects. This is especially clear in orthographic views where the grid completely obscures wireframe lines aligned to the grid placement. ...

GPU Particle Preview Flickering with Distance Field Collision

UE - Niagara - Jan 15, 2019

When switching from Scene Depth Collision to Distance Field Collision for a GPU particle system the preview window flickers, but returns back to normal when switching back to Scene Depth. Found in ...

Niagara System User Parameters Resetting After Closing the Editor

UE - Niagara - Jan 18, 2019

Niagara System user paramemters will reset upon restarting if they are used in a Blueprint. This also occurs to the system if you move the blueprint after making changes then pressing Ctrl+Z.  Foun ...

Meshes With Multiple Morphs / Blendshapes Import Incorrectly

OLD - Anim - Jan 31, 2019

MorphTargets/BlendShapes are read from the scene, not the morpher modifier. This also results in blendshapes names being equal to morph target object name (objects), rather then names from morpher m ...

Incorrect Skysphere Material Reflection with Ray Tracing

UE - Graphics Features - Lumen - Mar 5, 2019

The reflected Sky material looks blurry and low res when set to unlit, however setting the material to Default Lit has the correct reflection. Even though the reflection is correct the lighting brea ...

Sphere traces where Start and End locations are the same are not triggering any hits

UE - Simulation - Physics - Jan 17, 2019

This has changed since 4.21, AOE attacks are not being registered. Paulo S took a look and determined that this is an engine bug: Happens with any radius based attack. What I found is that any Sphe ...

"Enable Stencil Test" Mobile crash

UE - Graphics Features - Sep 10, 2019

A material with 'enable stencil test' will crash on mobile. Enable Stencil Test is a new option in materials as of 4.23 Confirmed with OpenGL 3.1 + 2 and Vulkan on Pixel XL Also Crashes on iOS ...

Datasmith - Materials cropped different fields in the same bitmap only display one texture

UE - Editor - Content Pipeline - Datasmith - Exporters - Mar 16, 2020

Material cropping in 3DS Max doesn't seem to translate well into Datasmith when they are used in the same bitmap. This was reported and tested in 4.24.3 (CL-11590370). This was reproduced in 4.23.1 ...

Get polygon data via GetPolysInBox that are outside the box

UE - AI - Navigation - Apr 6, 2020

GetPolysInBox should get only the polygons(FNavPoly) that are on the bounds of the box. However, there are cases where polygon data outside the bounds of the box is currently obtained. It gets polyg ...

Memory leak after simulating in Editor with opened 'Editor Preferences' tab

Tools - May 7, 2020

This can be repeated many times before the editor crashes without any messages and other programs with the video driver crashes too. Because out-of-memory. This is similar to [Link Removed]. This w ...