DX12/SM6 Sampler Counts increased for empty materials between 5.1 and 5.2

UE - Rendering Architecture - Materials - May 19, 2023

While not a major issue in and of itself, this can cause considerable headaches for materials where sampler counts in 5.1 were at 15/16 or 16/16 and when upgrading to 5.2 are now exceeding the built ...

Nav Area class is reset after updating from 4.19.2 to 4.20 Preview 3

UE - AI - Jun 21, 2018

When upgrading a 4.19.2 project to 4.20 Preview 3 the Nav Area Class is changed to None instead of the value it was before the upgrade. Upgrading from 4.18.3 to 4.19.2 works as expected. This was t ...

Lighting does not properly affect landscapes under another landscape, even if Static Lighting Resolution is increased

UE - LD & Modeling - Terrain - Landscape - Apr 29, 2015

Lighting does not properly affect landscapes that are below another landscape, even after static lighting resolution is increased. This results in some areas that should be completely shadowed to ha ...

Upgrading a project from 4.7 to 4.8 will cause the character to load before the level in a packaged game

UE - Gameplay - Jun 22, 2015

After updating a project from 4.7 to 4.8 the character will be loaded first when the project has been packaged out. ...

Point lights affect indirect lighting on RTGI much less than other types of lights

UE - Graphics Features - Lumen - Aug 4, 2020

Only point lights affect indirect lighting on RTGI much less than other types of lights.[Link Removed] Indirect lighting of baked lightmaps look much stronger than RTGI.[Link Removed] Apparently, ...

Manually changing the value for Constraint Value 1 & 2 causes odd visual issues

UE - Simulation - Physics - Jun 1, 2016

Changing the values that govern what bones a constraint is suppose to be a joint between (Constraint Bone 1 & 2) will cause issues where the transform widget is moved to an appropriate location but ...

Deleting a large number of unused variables from blueprints forces desktop to windows 7 basic mode until editor is closed

UE - Gameplay - Blueprint - Mar 30, 2015

Deleting a large number of unused variables from a blueprint forces the editor into windows 7 basic mode until the editor is closed. ...

Xcode 8.3.2 fails to successfully build 4.15.1 from source code

UE - Platform - Apple - May 2, 2017

Attempting to build 4.15.1 from source code using Xcode 8.3.2 currently results in the build failing due to warnings that occur in fbxsdk, AlembicImporter, and MetalRHI. ...

Externally Referenced error is produced after cloning a 4.6.1 project and converting it to a 4.7.6 project

UE - Foundation - Core - May 13, 2015

A User in unable to save there project because of they get warnings for all of the objects in their scene saying they are externally referenced. This happens after cloning a project and then convert ...

InstancedFoliageActor experiences issues with floating point precision when far away from World Origin and is not affected by Origin Rebasing

UE - World Creation - Worldbuilding Tools - World Composition - Jul 17, 2020

Foliage generated by Landscape Grass Type do not encounter this issue. Only hand painted foliage with foliage tool is not affected by rebased origin. Foliage vibrates when it is located in long dist ...