Unreal Engine Issues

CPU Lightmass generates different lighting results on a landscape if executed via a commandlet vs through the editor

Building lighting via commandlet and via editor are giving different results. To prevent one method from polluting the other via Swarm cache, the cache needs to be cleared in between tests. ...

Collision Channel on Particle Systems not saving

Setting the Collision Channel to anything other than World Static will reset on closing and restarting the editor. ...

Particle Effects Do Not Play in Transition Maps

Particle effects do not seem to be playing in transition maps. Found in 4.13.1. Reproduced in 4.12.5 and 4.14 Preview 1. ...

ShadowProject gpu performance regression from Aftermath

The issue was originally noticed between 4.15.1 and 4.16 Preview, but now appears to have regressed between 4.15.1 and 4.15.2. ...

CLONE - ShadowProject gpu performance regression from Aftermath

The issue was originally noticed between 4.15.1 and 4.16 Preview, but now appears to have regressed between 4.15.1 and 4.15.2. ...

MaxDrawDistance does not work with HLOD

1. Create HLOD. 2. Set DesiredMaxDrawDistance. 3. DistanceCulling does not work. ...

Adding a Scene Capture 2D to Render Target will override Motion Blur settings in level

With a Render Target From Scene Capture 2D setup in a level , the motion blur settings from a global post process volume is overridden. Was investigating Scene Captures picking up Motion Blur when ...

Precompile occurs in Niagara when Standalone is started, increasing load time.

In 4.26.1, if you remove the collision module from NiagaraSystem, the Precompile will not occur. ...

Inserting before a FSlateImageRun twice will cause crash

NiagaraSystem with EniagaraGpuComputeTickStage::PostInitViews rarely crashes due to multi-thread race conflicts

NiagaraSystem with EEiagaraGpuComputeTickStage::PostInitViews should not have bSupportsParallelGDME because of possible multi-threaded contention, but FNiagaraSystemInstanceController::GetGpuCompute ...