Insufficient precision of Decode71 function

UE - Rendering - Architecture - Shaders - Jun 5, 2025

Encode71 and Decode71 in DeferredShadingCommon.ush are functions that convert 8-bit values ​​to 7-bit values ​​and mask values, and licensees have reported that the accuracy is insufficient when usi ...

ChaosCacheManager is not recording the Observed GeometryCollections NotifyBreak states between level loading and will default to false if changed from Record to Play

UE - Runtime - Simulation - Mar 28, 2025

ChaosCacheManager (CCM) is not recording the Observed GeometryCollections (GC) NotifyBreak states between level loading and will default to false if changed from Record to Play. AChaosCacheManager ...

Unable to Edit Curve Names between 2 Different Animsets (if name of curve is the same)

OLD - Anim - Aug 13, 2015

If you create 3 curves in AnimSequence A and name them 1, 2 and 3 respectively, then create 3 curves in AnimSequence B and name them 4,5 and 6 respectively... In AnimSequence B you will not be able ...

Crash after converting to 4.7.0 from 4.6.1

UE - Gameplay - Blueprint - Feb 26, 2015

User is crashing when opening project after converting to 4.7. [Link Removed] [Link Removed] LOG IS ATTACHED 4.6 project with updated plugin: [Link Removed] ...

Broken hair material with light function

UE - Graphics Features - Dec 19, 2024

Hair Materials do not react to Light Functions in the same way as other Materials. There is a visual difference between a Directional Light at 1 lux with no Light Function and a Directional Light at ...

LIVE: Manually importing a single LOD created in Maya will rotate -90 degrees

UE - Editor - Content Pipeline - Import and Export - Nov 5, 2014

DESCRIPTION: When importing a mesh created with Maya then saving, closing, and reopening the editor, if you add a LOD via the right mouse menu or mesh editor will result in the LOD importing -90 rot ...

WP level instance runtime settings affect streaming generation

UE - World Creation - Worldbuilding Tools - World Partition - Nov 16, 2023

If a level instance uses different runtime settings then it can override the main WP's runtime settings with UWorldPartitionRuntimeSpatialHash::ApplyCVars Runtime settings:GRuntimeSpatialHashUseA ...

BoxOverlapActors fails to catch an Overlaped actor with a particular scale, from a particular position

UE - Runtime - Simulation - Sep 30, 2025

BoxOverlapActors fails to overlap a scaled Floor actor with a particular scale, from a particular position and extent. The setup is really specific and described in Steps to Reproduce. The required ...

Slider Values are not working inside of a blueprint

UE - Gameplay - Blueprint - May 7, 2015

Slider Values are not working inside of a blueprint in 4.8 Preview 1. User Description: Problem with the numeric float/int boxes in the editor in Blueprints, if for example open the TPS Template a ...