FDateRange cannot be declared as UPROPERTY

UE - Core - Systems - Sep 4, 2024

Unlike other range wrapper structs, such as FFloatRange, marking a FDateRange as a UPROPERTY results in the following error: error : Unable to find 'class', 'delegate', 'enum', or 'struct' with nam ...

Ray traced shadow appears for translucent material after LOD change

UE - Rendering - Graphics Features - Ray Tracing - Aug 21, 2024

When ray-traced shadows are enabled, the shadow for a completely translucent mesh appears when the LOD changes based on distance. ...

Biquad Filter is incorrect when bandpass is 1.0

UE - Audio - Aug 20, 2024

The bandwidth on the biquad loepass filter is cutting frequencies well below 20kHz when the bandwidth is 1.0. Slack convo: [Link Removed] Visualization:[Image Removed] ...

Lightmap UV generated on Windows and Mac is not deterministic

UE - Graphics Tools - Modeling Tools - Aug 7, 2024

Lumen Reflections in Stereo are broken after Nvidia GPU Driver Update

UE - Platform - XR - Jul 29, 2024

After updating the NVidia graphics driver to v.552.74+, reflective/mirror materials appear broken and render with black and white lines in VR mode if they are in a level with a Post Process Volume w ...

UHapticFeedbackEffect_SoundWave Initialize does not populate Raw Data in the HapticsBuffer

UE - Platform - XR - Jul 19, 2024

From the UDN:  >  Open HapticsFeedbackEffect.cpp and naivgate ~ line 150; note HapticBuffer has length populated but never write the actual buffer data. LikeReplySelect as Best Seems like a simple f ...

Objects that return false for NeedsLoadForClient not loaded on listen servers

UE - Networking - Jul 19, 2024

For instances that are not a dedicated client or dedicated server (e.g. packaged games with TargetType "Game"), GIsClient will be true, but GIsServer will be false. This leads to objects that retur ...

FNetGUIDCache warning when attaching non-replicated component to a replicated scene component

UE - Networking - Jul 18, 2024

When the replicated scene component's AttachChildren array is replicated, the package map attempts to serialize the non-replicated component, causing the warning that the object is not supported. ...

Scalebox scaling won't update if child size changes with global invalidation enabled

UE - Editor - UI Systems - Slate - Jul 17, 2024

When global invalidation is enabled, Scale Boxes don't react properly to changes in the size of their contents. Licensees have worked around this by updating SScaleBox::OnArrangeChildren:// This sca ...

Imposter renders incorrectly in PCG volume after updating to 5.4

UE - World Creation - Procedural Tools - PCG Component - Jun 27, 2024

The last level of impostors in PCG volumes render incorrectly after updating from 5.3 to 5.4. ...