Displacement + TAA causes "vibrating"/"buzzing" artifacts

UE - Rendering Architecture - Jun 4, 2024

There is a buzzing artifact on shadows that is seen in the provided test project. The problem seems to be far more subtle when VSM is turned off. Licensee mentions that turning r.Velocity.ForceOutpu ...

"Assertion failed: CellIndex < CellIndexMax" when there are a lot of HISM foliage in a level

UE - World Creation - Worldbuilding Tools - Foliage - Aug 19, 2024

Users have come across an issue in 5.4 that causes an assert when many foliage or HISM objects are placed in a level due to a cell size limit. ...

Material is not always updated after SketchUp file reimport.

TM - Interoperability - Dec 4, 2024

The second file uses the same material as the first one, but it's color has been modified in the DCC.  Not reproducible with Datasmith import. In that case the material is correctly updated in all c ...

Blueprint array nodes do not display comments

UE - Gameplay - Blueprint - Mar 6, 2015

When you create an array node within a blueprint and add a comment to it, it doesn't show up. This includes the 'add' or 'remove' nodes that are pulled from the original array node. This seems to o ...

Too large project icon image causes engine to crash

Tools - Apr 27, 2015

The engine will crash if you upload a project icon that's way too large for the 192x192 area. It'll also crash when you open that project back up and try to access the project settings ...

Components and Actors attached to physics objects (with weld) are not solidly attached

UE - Simulation - Physics - Jul 2, 2015

Components and Actors attached to physics objects are not solidly attached. The child actor tends to float around in relation to the parent. Occurs even when using a "Weld" attachment In the exam ...

LIVE: Editor crash on open if saved with detached viewport and sky light in level.

UE - Graphics Features - Oct 21, 2014

If there is a sky light in a scene and the viewport is detached and closed prior to saving, the editor will crash when trying to reopen the project. Crash Reporter: 431802 ...

Cannot Compile GitHub Source Code for UE4 Game on Mac

UE - Platform - Apple - Apr 16, 2015

Dowloaded 4.7.5 release from GitHub and was able to compile the UE4 Editor source code successfully. Then attempted to compile using the "UE4 - Game -Mac" filepath, but received message saying could ...

Initial Color Vector Parameter cannot be set for GPU Particles

UE - Graphics Features - Nov 7, 2014

GPU particles will not take a changing input from Initial Color when using a Vector Parameter to control through a blueprint. ...

Make Custom Event names start with "Event"/Fix "Event Event" issue with overridden Events

UE - Gameplay - Blueprint - Dec 17, 2015

If you name an Event something like "Event Foo", overriding the event in a ChildBP gives you "Event Event Foo" To avoid this, please make Custom Event names Start with "Event" ...