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

UE - Niagara - Jun 11, 2018

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 ...

The number of seconds in Graph View of Session Frontend is significantly different from the actual time

Tools - Jun 11, 2018

The number of seconds in Graph View of session frontend is significantly different from execution time of "start file" and "stop file". Since the number of frames is correct, probably some problem ...

Thumbnail of material is not previewed if FSoftObjectPath is used.

UE - Editor - Content Pipeline - Import and Export - Jun 11, 2018

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

UE - Platform - XR - Jun 10, 2018

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

FQuat::NetSerialize modifies the original value which can cause it to be replicated continuously

UE - Networking - Jun 8, 2018

FQuat::NetSerialize will always call Normalize() as part of replicating the current value, so that only the X, Y, and Z components need to be serialized (the W can be computed on load). This operat ...

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

UE - Simulation - Physics - Jun 8, 2018

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

UE - Graphics Features - Jun 8, 2018

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

UE - Graphics Features - Jun 8, 2018

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

UE - Editor - Content Pipeline - Datasmith - Exporters - Jun 8, 2018