"Pass-By-Reference" inputs to a multicast RPC can crash

UE - Networking - Oct 6, 2021

Passing a parameter by reference for an RPC does not seem to be a supported operation, and UnrealHeaderTool will already throw an error if a networked UFUNCTION includes any OutParms. However, users ...

ETraceTypeQuery and EObjectTypeQuery not fully exposed to Python

UE - Editor - Framework - Python - Oct 5, 2021

The ETraceTypeQuery and EObjectTypeQuery enums declared in EngineTypes.h aren't fully exposed to Python. Both enums have 32 entries, but Python is only aware of the first 2 for ETraceTypeQuery and t ...

When CascadeToNiagara, the Disable state of Emitter is not converted properly.

UE - Rendering - Niagara - Oct 5, 2021

In CascadeToNiagaraConverter.py # copy the emitter enabled state. enabled = ue_fx_utils.get_lod_level_is_enabled(cascade_emitter_lod) niagara_emitter_context.set_enabled(enabled) It stores the ...

Jittering appears when setting DOF in ES3.1

UE - Platform - Mobile - Oct 5, 2021

For reference, it was fine in 4.24 In particular, jittering is severe when the camera is moving. GaussianHalfRes has been removed in CL 14036168, which is likely to cause degradation issues if int ...

Fbx Importer: Make sure the blendshape curve keys have the correct tangent scale

UE - Anim - Oct 4, 2021

The tangent of the blendshape curve seam to have the wrong scale (but correct direction) from this UDN. https://udn.unrealengine.com/s/question/0D54z000079J03OCAS/skip-compressing-anims-and-buildin ...

Bool input pins connected to boolean logic nodes can fail to compile

UE - Anim - Runtime - Oct 1, 2021

Bool input pins will fail to compile when connected to a boolean logic node and the node also has a float input pin that is currently connected. Compilation will fail with the error Default value ' ...

AbsoluteWorldPosition and PDO not working correctly in SingleLayerWater calculations

UE - Rendering - Oct 1, 2021

The licensee has provided a recommended fix for this issue. Please see the UDN.  ...

There's no motion blur on streaming GeometryCache

UE - Editor - Datasmith - Sep 28, 2021

UDN customer mentioned: "there looks to be support for motion vectors as exported from DCC apps (for rare cases like fluid sim), but regular in-engine motion vector calculation for regular motion bl ...

Groom + RT refraction not working correctly

UE - Rendering - Sep 28, 2021

Oculus Quest "Reset View" command doesn't work with OpenXR

UE - Platform - XR - Sep 27, 2021

upd. Regression was checked on //UE4/Release-4.26 CL 17626593 Issue wasn't reproduced. Regression - Yes ...