Child Actor Components jitter around in blueprint viewport when dragged

Gameplay - Components - May 18, 2020

REGRESSION: Does not occur in 4.24 Dragging a child actor component in the blueprint viewport results in it bouncing and jittering. ...

Spline Mesh Collision doesn't work in packaged game when spawning them at runtime

Physics - May 18, 2020

Spline Mesh Components lose their collision in a packaged game when spawning them at runtime, or modifying them via 'Set Start and End' function at runtime. ...

4.25 ECC_GameTraceChannels default parameter value results in compile error

Core - UnrealHeaderTool - May 18, 2020

Hidden enum entries cannot be used as default values for UFUNCTION parameters. When using any collisionchannel, the error "Hidden enum entries cannot be used as default values" is received. ...

Inconsistent memory usage bump when using SceneCaptureComponent2D on iPadAir2

Platform - Mobile - May 18, 2020

I do not have access to an iPad Air 2 so it is impossible for me to reproduce, but it seems that when using SeneCaptureComponent2D on the device, memory usage will increase drastically. ...

On PC and Mobile Preview, Volumetric Lightmap provide very different Indirect lighting direction

Rendering - Ray Tracing - May 18, 2020

Expectation: It's known it has different lighting interpolations method and quality for VLM on PCvsMobile; but Indirect lighting from VLM should provide similar lighting Direction on PC&Mobile. ...

When enabling virtual texture lightmaps it looks different viewing

Rendering - Ray Tracing - May 15, 2020

After switching the Virtual texture lightmap on/off, it looks different. It looks like there is a difference in the light map because there are some missing shadows (see attached screenshots). ...

Fbx exporter do not support material instance

Tools - Import - May 15, 2020

The fbx exporter should support material instance to export the same result has the user see in the content browser or in the level editor. The fbx exporter should query component material override ...

Set Playback End will cause a sequence's upper bound to be inclusive.

Tools - Sequencer - May 14, 2020

FSequencer::SetPlaybackEnd calls SetUpperBound which creates a TRangeBound with the default bounds type, so the end frame will be inclusive instead of exclusive. ...

Cannot access private member MarkPropertyDirtyFromRepIndex error when building a nativized blueprint with a replicated property

Networking - May 14, 2020

The following error occurs when building a project that has a replicated variable with the replication condition set to Skip Owner inside a nativized blueprint.UATHelper: Packaging (Windows (64-bit) ...

PropertyAccessUtil methods do not do propagation to instances when editing archetypes

Tools - May 14, 2020

Currently value propagation is handled at the property node level (c.f., PropagateContainerPropertyChange), and is unavailable to any other editor code / scripting (whether in Python or BP or C++). ...