Unreal Engine Issues

SeparateTranslucency doesn't work with MSAA on mobile.

DynamicMeshBuilder.cpp does not add a value to the InTangentY variable in the AddVertex function

This was found as a result of Licensees doing a Code Review of the Engine code. Here's the code snippet in question. It seems to be missing a line similar to Vertex->TangentY = InTangentY;.:  int32 ...

SkyAtmosphere is not displayed in ES3.1 Preview

Atmospheric Fog is not displayed as well. ...

MarkComponentsRenderStateDirty not called when bHidden is replicated

SetActorHiddenInGame will call MarkComponentsRenderStateDirty, but when the new value is replicated to the clients, the render state is not marked dirty when the change is received. ...

Directories to never cook does not appear to be working

Marking as a regression as this issue did not occur 4.25.4 I've attached project logs and "unrealpak -list" output from both 4.25.4 and 4.26 to this ticket. ...

Reflection looks Brighter on Mobile Preview than on PC

Relevant Ticket and UDN [Link Removed] [Link Removed] ...

Crash on project startup due to certain Skeletal Mesh being accessed

If you open the 6 assets that were close unexpectedly it will crashEnemy (Blueprint), Player_BP (Blueprint) and ThirdPersonGameMode (Blueprint) it crashesThe texture and Projectile_Base (Blueprint) ar ...

The TransformVectorAbsoluteToLocal and TransformVectorLocalToAbsolute seems be implemented inversely

FBX SkeletalMesh import - Some custom attribute values interfere with SkeletalMesh Import/Export

It appears that the value of a string custom attribute on a SkeletalMesh node can interfere with the import process of the SkeletalMesh, as well as with the export process according to UDN. Adding t ...

Datasmith Metadata returned as empty array on Python Import

Metadata information seems to not be available on import. A user has reported that this was working before but I was able to reproduce the issue in //UE4/Release-4.24 cl 11590370 I am currently lis ...