Add ThinLTO support to iOS

UE - Platform - Apple - Jun 27, 2023

iOS link times could be sped up by adding ThinLTO support as was done for Android recently. ...

Iris - check hit in FNetBitStreamWriter::InitBytes if object has only COND_InitialOnly replicated properties

UE - Networking - Iris - Jun 22, 2023

InitOnly FReplicationStateDescriptors will have a value of 0 for ChangeMaskBitCount, so if an object only has COND_InitialOnly properties, its FReplicationProtocol will also have a ChangeMaskBitCoun ...

VerboseCookerWarning warnings: Saving object into cooked package %s which was created at cook time, Object Name UniqueObjectNameForCooking_0, Full Path %s, Outer class %s

UE - Foundation - Data Pipeline - Cooker - Jun 19, 2023

Creating objects at cook time that are exported into the cooked package is a possible cause of indeterminism, and therefore we have banned it in engine classes and will fire a warning about it. Cur ...

Assert when creating new landscape

UE - Graphics Tools - Terrain - Landscape - Jun 16, 2023

Generated from CrashReporter ...

Expose atlas parameter to CurveAtlasRowParameter node as well

UE - Rendering Architecture - Materials - Jun 12, 2023

This has been spotted and notified by a UDN user through case [Link Removed] The CurveAtlasRowParameter node exposes the Curve parameter to be overridden in derived Material Instances but not the A ...

Third person camera lag issue for vehicle in multiplayer

UE - Simulation - Gameplay - Jun 9, 2023

There's a vehicle/third person camera stutter observed as the vehicle corners. The issue appears worse with Physics Async mode enabled, and less perceptible with this mode disabled. This video was ...

Long thin spinning objects take too long to stop spinning

UE - Simulation - Core - Jun 5, 2023

See the SpinningObjectStability test map in the Physics Sandbox. [Link Removed] It's not clear if this is a bug or a side effect of some of our solver shortcuts (e.g., omission of the precession te ...

Objects without custom delta properties can return false for CanSkipUpdate with net.PushModelSkipUndirtiedReplication enabled

UE - Networking - Jun 5, 2023

This seems to occur after receiving a Nak for certain actors. FObjectReplicator::ReceivedNak will decrement SendingRepState.CustomDeltaChangeIndex even if the object has no custom delta properties. ...

Cooker Generated Packages: Actors can trigger the "load" of generated packages from linker load and load them incorrectly

UE - Foundation - Data Pipeline - Cooker - May 31, 2023

Generated packages have to be constructed by the cooker via FGeneratorPackage::CreateGeneratedUPackage. Some fields on the UPackage are set and ICookPackageSplitter->PopulateGeneratedPackage is call ...

Visual Noise on Thin Translucent materials with a Directional Light

UE - Graphics Features - May 30, 2023

Regression in testing This occurs with hardware and software ray tracing, as well as moveable and static lights This occurs regardless of anti aliasing. This was tested with DX12 ...