MaterialInstance ScalarParameter's desc can not upadate.

UE - Rendering Architecture - Materials - Jul 19, 2017

When this problem occurs, "MaterialExpression" is null in FMaterialInstanceParameterDetails::GetParameterExpressionDescription. ...

Warning on compiling Sub Anim Instance node with connection to exposed variable

OLD - Anim - Oct 10, 2017

When compiling an animBP with a Sub Anim Instance node with a connection to an exposed variable, warning will be displayed. When there is no connection to the Sub Anim Instance node, no warning wi ...

Collision for hidden mesh is not displayed in PIE using Showflag.collisionpawn

OLD - Anim - Oct 23, 2017

When playing in viewport, the user is not able to see the collision of a mesh marks as hidden in game if they run the "Showflag.collisionpawn 1" console command. ...

Non replicated child actors placed in scene not destroyed

UE - Networking - Nov 9, 2017

When a non-replicated actor is destroyed on the client through the use of bNetForce, any child actors that are also non-replicated will not be destroyed correctly. ...

Duplicating actor blueprint messes up component hierarchy

UE - Gameplay - Blueprint - Mar 16, 2018

Duplicating an actor Blueprint (via ALT+drag, copy paste, or CTRL+W) will result in the copy losing all Hierarchy structure from the original. ...

Material editor: Custom node doesn't generate error in stats output

UE - Graphics Features - Aug 22, 2018

In 4.20 custom code material nodes no longer output their errors to the stats window. ...

ForceActorRelevantNextUpdate will only force an update on the first connection

UE - Networking - Mar 21, 2019

The ForceActorRelevantNextUpdate will only trigger an update on the first connection in the list. Note that the ForceActorRelevantNextUpdate does not work on dynamic actors since their ActorChannel ...

Gameplay Abilities: FAttributeSetInitterDiscreteLevels::PreloadAttributeSetData does not allow FGameplayAttribute.

UE - Gameplay - Jun 19, 2019

Moving from "float" to "FGameplayAttribute" is causing a test to fail. ...

Landscape material renders as default material on TM-AnimPhys

UE - LD & Modeling - Terrain - Landscape - Jun 6, 2019

Landscape material renders as default material on TM-AnimPhys: LogMaterial: Warning: /Game/Maps/Framework/TM-AnimPhys.TM-AnimPhys:PersistentLevel.Collision-Landscape.LandscapeMaterialInstanceConstan ...