Unreal Engine Issues

Materials are added to a Model that has been modified by Cube Grid

This is not a regression. Tested in //UE5/Release-5.1 CL23901901 Changing materials before making a change to a model with cube grid causes that previous selected material to be added to the model ...

checkSlow hit when using array with replication condition in Iris

For arrays, FPropertyReplicationStateDescriptorBuilder::IsSupportedProperty will set the FMemberProperty's ChangeMaskBits to "1U + FPropertyReplicationState::TArrayElementChangeMaskBits". If the arr ...

In LandscapePatchComponent, expose HeightTextureAsset and HeightSourceMode to BP

Requested by UDN : https://udn.unrealengine.com/s/case/500QP00000RyWvAYAV/requesting-an-engine-mod-to-access-certain-landscape-texture-patch-properties-in-blueprints-via-getters?fromCase=1 ...

Pasting an instanced subobject property into a Blueprint prevents that Blueprint from being added to level

Copying and pasting an array of nested instanced subobjects from a level instance into a Blueprint's defaults and adding that Blueprint to the level will prevent the actor instance from saving. ...

Duplicate subobjects when you attach to an OptionalDefaultSubobject

I believe that this is happening because of a problem within USubobjectDataSubsystem::FindOrCreateAttachParentForComponent where it is creating duplicates of the character mesh because the "TestScen ...

VC Runtime not in UnrealLightmass temp directory; causing lightmass build errors

A Redistribute file for VS 2015 is needed to build lightmass, but this is not currently included with the engine. If a user does not have VS 2015 installed, lightmass will fail with this error: Un ...

Collision Boxes not set properly when using negative values

When using multiple collision boxes with the mesh scaled in a negative axis while the collision boxes are rotated that the rotation is not taken into account when using the negative scale. ...

Editor will crash when Blueprint Details Panel is dragged across the Event Graph

When dragging the Details Panel in a Blueprint across the event graph the editor will crash. [Link Removed] ...

FPackedRGBA16N is divide by 32768 twice in NEON/FPU

External Reference Spam when converting projects to 4.9

Map Check message log gets spammed with External Reference warnings when a project is converted to 4.9 from a previous engine version. These warnings don't seem to actually do anything to projects o ...