MaterialExpressionLandscapeLayerBlend with material attributes as inputs, the output material attributes have wrong sizes

UE - Rendering - Materials - Mar 14, 2022

From the UDN ticket: When using MaterialExpressionLandscapeLayerBlend with material attributes as inputs, the output material attributes have wrong sizes: ie output Normal attribute cannot be conve ...

Gameplay Effect Modifiers with Target Tags are Applied Incorrectly

UE - Gameplay - Components - Mar 9, 2022

If you have a Gameplay Effect that uses an Attribute Modifiers, and this modifier has Target Tags specified, the modifier is applied unexpectedly:Adding a Required tag on the Target, the modifier do ...

AssetRegistry.bin is not deterministically cooked.

UE - Foundation - Core - Cooker - Mar 8, 2022

AssetRegistry.bin is not deterministically cooked. NativeLibraries is turned off because .ushaderbytecode has a non-deterministic issue in [Link Removed]. And there is a similar issue with UE5 in [ ...

[Electra] Electra fails to play video after the second time with the fast Vsync option via NVIDIA control panel

Media Framework - Mar 3, 2022

It seems to be a NVIDIA's driver-side issue.  ( Driver version is 511.79. ) The users can avoid the error by canceling the fast VSYNC option and reverting to the default VSYNC setting. Alternative ...

[Standalone Installer] The binaries for Mac are missing

UE - Editor - Datasmith - Installers - Mar 1, 2022

FEditorFileUtils::SaveCurrentLevel returns true even when it fails

UE - LD & Art - World Building - Feb 25, 2022

In FEditorFileUtils::SaveCurrentLevel, we set the default return code as true (success) before checking validity of the current level or seeing if PromptToCheckoutLevels is successful. If we're unab ...

References to recompiled Blueprint CDOs that exist outside of the immediate class hierarchy are not being replaced during compilation.

UE - Gameplay - Blueprint Compiler - Feb 24, 2022

Currently, the Blueprint compiler will only update references to a reinstanced CDO/archetype object if it falls within the immediate hierarchy of the Blueprint class type OR if it's a component temp ...

Incorrect behavior when bAutoCalculateSpline==true for a Spline IK node

UE - Anim - Runtime - Anim Blueprints - Feb 23, 2022

UDN user reports that the calculations used to auto-calculate spline points is incorrect, solution supplied in the UDN ticket. ...

Key Interpolation method is not saved when calling the color picker by key editing of Sequencer

UE - Anim - Sequencer - Feb 17, 2022

The problem is that the interpolation method is not saved when editing the Vector Parameter. ...

Niagara : incorrect rendering on D3D12 when rendering a very large number of meshes

UE - Rendering - Niagara - Feb 17, 2022

The input argument of DrawIndirect for Niagara meshes, which is made by ComputeShader, may be invalid. This problem does not appear with -onethread command line option. ...