Materials with transparency still visible in alpha with holdout in Render layers.

TM - Tools - Mar 8, 2024

The Transparent materials like the Glass don't behave correctly in Raster (in PT is working as expected).  They are visible in Alpha with Holdout.  This is an Engine limitation for now. But we sho ...

Unable to Create New Niagara User Parameter After Deletion without Niagara Editor Window Restart

UE - Niagara - Scripting - Apr 22, 2024

When a user deletes a Niagara User Parameter within the Niagara System editor window, attempting to create a new parameter with the same name immediately after deletion results in an error. Despite ...

Pie startup optimization: UWorld::PostDuplicate::ValidateTextureOverridesForPIE optimization

UE - Foundation - Core - EditorLoader - Jul 29, 2024

Here is a snap shot of the propose UDN change: TRACE_CPUPROFILER_EVENT_SCOPE(ValidateTextureOverridesForPIE); TSet<UMaterialInterface*> ProcessedMaterials;TArray<UPrimitiveComponent*> Components; ...

Recast rcScopedDelete<T>::resizeGrow copies too many elements

UE - AI - Navigation - Nov 5, 2024

Context The Recast module has a helper struct rcScopedDelete for allocating, resizing and automatically freeing the allocated memory when the struct goes out of scope. Its allocation functions can ...

When adding the UIRenderer to the Movie Render Queue, the rendering output is a difference in PIE and MRQ.

UE - Anim - Sequencer - MRQ - Dec 5, 2023

UI rendering in PIE and UIrenderer rendering in MRQ produce different output results. This is because when dealing with fades in the UI, the rendering results should not be different.  Workaround ...

After attach a component to a simulated component by socket miss collisions

UE - Simulation - Physics - Jun 9, 2023

If attaches a StaticMeshComponent with collision active to another actor with a SkeletalMeshComponent simulating physics by socket name the StaticMeshComponent miss collision for simulation. Chec ...

PIE with split screen prevents some drop down menus from working in Sequencer

UE - Editor - UI Systems - Slate - Jun 14, 2024

Create a level sequence, add an audio track and an event trigger track to the sequenceAdd a keyframe to the event track and create a new endpoint for the keyAdd an audio section to the audio trackIn t ...

Invalid access location compressing a BC6h texture in the editor

RAD - Oct 29, 2024

Large texture crashes during Oodle compression with "-stompmalloc". It appears to be an internal Oodle error. Also tested on //UE5/Release-5.5/, CL: 37463908 ...

USkeletalMeshComponent::SkeletalMeshAsset modified value is lost when changing via level details panel

UE - Anim - Runtime - Jun 27, 2024

USkeletalMeshComponent::SkeletalMeshAsset is transient so it seems that any modified value that is set via the level details panel on an existing actor is lost.  We deal with this same problem for o ...