Loading error for editor only BlueprintNativeEvent functions

UE - Framework - Blueprint Compiler - Sep 26, 2025

The editor-only function in the native parent class is not compiled in the game module, which is why we're getting this error. The Blueprint compiler should follow suit during cooking and not genera ...

Custom Depth range is different than Pixel Depth range

UE - Rendering Architecture - Shaders - Sep 25, 2025

Shaders that compare custom depth and pixel depth get wrong output values because the ranges are different. This error is most noticeable over large distances. The difference in ranges is due to t ...

[Mobile/Forward Rendering] PlanarReflection does not work when the reflection plane faces certain directions

UE - Platform - Mobile - Sep 24, 2025

Note: This repros on 4.27 and all 5.x versions. When using the mobile renderer and/or forward shading, Planar Reflection will simply not work if the reflection plane normal has components that add ...

Datasmith Archicad - Transform will not resync properly when modifying roof thickness and transforms

TM - Interoperability - Sep 24, 2025

Reported in SF [Link Removed] With Datasmith Direct Link from Archicad, when adjusting the roof thickness for an imported roof any adjustments to the transform of the roof will not update on resync ...

Iris - actors spawned/loaded before a connection exists will not use delta compression

UE - Networking - Iris - Sep 24, 2025

FDeltaCompressionBaselineManager::CreateBaseline will return early if the object has an invalid ObjectInfoIndex, which is allocated in FDeltaCompressionBaselineManager::UpdateScope (by calling FDelt ...