Unreal Engine Issues

Dynamic navmesh update causes navlinks to reset to their default state

Updates to dynamic navmesh cause navlinks to reset to their default state. Navigation still shows the path as accessible even though it isn't. This is a regression from 4.23.1 (CL-9631420) where th ...

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 ...

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 ...

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 ...

Editor crashes if Timeline Play Rate node is copied/pasted in blueprints

Editor crashes when Timeline Play Rate node is copied/pasted. Frequency: 2/2 Crash Reporter: [Link Removed] Callstack: MachineId:4E82586D46B558EA69EF0EAA821297B1 EpicAccountId:1558531203f84e81 ...

Editor crash after attempting to create layer info in new landscape window

Attempting to create landscape layer info from within the new landscape creation window crashes the editor. Workaround: create the landscape, switch to paint mode, create layer info in paint mode w ...