Unreal Engine Issues

Billboard appears darker on Mobile preview than in editor

When playing in mobile preview or on the mobile device. The color is darker than what is seen in the editor. ...

Spawned particles on the surface of a static mesh in Niagara get offset if the actor is anywhere but the world origin

Particles that are spawned using the surface of a static mesh will be offset from the systems placement in the world unless it is at world origin.  Working as expected in 4.19 CL# 4033788 Found in ...

Thumbnail of material is not previewed if FSoftObjectPath is used.

https://udn.unrealengine.com/questions/437463/%E3%83%9E%E3%83%86%E3%83%AA%E3%82%A2%E3%83%AB%E3%81%AE%E3%82%B5%E3%83%A0%E3%83%8D%E3%82%A4%E3%83%AB%E3%81%8B%E8%A1%A8%E7%A4%BA.html ...

UARTrackedImage doesn't update after detection

UARTrackedImage doesn't update even if moving the printed paper.  It is probably because FAppleARKitSystem :: SessionDidUpdateAnchors_Internal does not correspond to EAppleAnchorType :: ImageAnchor ...

The order of Actors assigned to a Physics Constraint affects the simulation

The order in which actors are listed on a physics constraint affects the physics simulation. This should not make any difference in how the physics are simulated. Regression?: No This occurred in ...

Volumetric Fog causing light to get darker after each lighting build

With dense volumetric fog enabled it will cause the lighting to get darker each build you do. ...

Packaging fails with too many instanced static meshes

Project will fail to package with more than one actor containing ISM Components. From user: "...After some testing I found that it only occurs if there are multiple actors in a map (either of the ...

Datasmith Max import- Datasmith reimport Material option missing after reopening UE4

SunTemple crash on load on some iOS devices

This does not occur when attempting to repro using a template code project; testing on the same device. This crash occurred on an iPhone 6, v11.4 (A8) It did not occur on an iPhone X, v11.4 (A11 B ...

Directional Light settings remain from previous level when creating new level when using forward rendering

Using Forward rendering, directional light settings persist across levels and after deletion. Video attached, shows problem in Dev-VR but same issue occurs in Release-4.20 ...