Unreal Engine Issues

Spawn Burst Instantaneous Doesn't Work with Emitter.NormalizedLoopAge Spawn Time Set to 1

Unable to uncap framerate in Vulkan

On Linux machines users are unable to uncap their framerate in the editor. This issue has been observed in multiple maps, including TM-URO and TM-AnimPhys, as well as Third Person Blueprint projects ...

Using a custom playback range in the MRQ doesn't work if its the same as the original, but it has a camera cut track that differs in length

Missing shadows when combining CSMCaching and Nanite

A Nanite primitive casting a CSM shadow on another Nanite primitive with "Cast Shadows" disabled, will have it's shadow disappear completely when r.Shadow.CSMCaching = 1. ...

Distance Fields no longer work with instances when PIE/Simulate

When using distance fields with instance meshes from the foliage tool everything works correctly, however, when simulating or PIE the distance fields will be removed. This working correctly in 4.7.5 ...

NetMulticast and BlueprintCallable C++ functions reportedly have incorrect parameters

Bug report from AnswerHub. Need to figure out why C++ functions tagged NetMulticast and BlueprintCallable send the wrong paramters to some clients. ...

Skeletal mesh always registers as Dynamic when testing collision

Skeletal meshes do not respect collision changes from World Dynamic, always returns as Dynamic. Regression (no) issue (does) occur in 4.12.5 ...

Importing skeletal mesh with LODs and uniform scaling results in multiplicative scale per additional LOD

Here's a quick chart showing the current multiplicative pyramid style scaling that's occurring.Import ScalingLOD0LOD1LOD2LOD32.0248160.50.50.250.1250.06255.0525125625 ...

4.23 UpdateGrass took twice time than 4.22

Actors in always loaded sublevels are not immediately recorded into replays

In FReplayHelper::ReplicateActor, we check Connection->ClientHasInitializedLevel(Actor->GetLevel()) to see if the actor should create a channel or not. However, the DemoNetConnection does not have a ...