Unreal Engine Issues

Open Formats: Interchange Import Runtime - Interchange ImportAssetAsync runtime GLB import — materials, textures, tangents, and shaders non-functional in packaged builds (6 issues, UE 5.7.4)

Description* We are using Interchange's `UInterchangeManager::ImportAssetAsync()` to import GLB files at runtime in a packaged (Shipping) application. The orchestration layer (`ImportInternal` in `In ...

GetStaticComponentMaskParameterValue returns the value for Static Switch Parameter

UMaterialInterface::GetStaticComponentMaskParameterValue gets the parameter value from the static switch list instead of from the StaticComponentMask list GitHub branch 5.8 still looks to have this ...

Megalights support for anisotropic materials

A licensee noticed that SUPPORTS_ANISOTROPIC_MATERIALS is not passed to FShadeLightSamplesCS::ModifyCompilationEnvironment for MegaLights ShadeLightSampleCS. Adding it fixes the issue. ...

CharacterMovementComponent boosted upward when falling into acute-angle sloped corner

In UCharacterMovementComponent::TwoWallAdjust, characters can gain unintended upward velocity (slope boosting) when hitting corners with an acute angle (<=90 degrees) while in the Falling movement m ...

Niagara System is causing Application SpaceWarp to get disabled

Raytraced Hair Lighting using Light Functions atlas and positions the Light function material doesn't render correctly

Light functions don’t render on grooms when using ray traced shadows and positions in the light function material. The setup:A light (point/rect/spot) pointing to a groom hair system. The light's ...

Double to float conversions of time in renderer causes precision issues

In game sessions when the value for world time becomes large enough we start running into floating point precision issues. These issues can easily be seen in materials which do periodic animation b ...

HandleKismetEvent (console cmd 'ke'): GT-ALT deadlock when user function flushes async loading

Context In builds with the in-game console enabled, users can use the ‘ke’ command to execute UFUNCTIONS on any object:ke * MyFunc // run MyFunc() on ANY UObject with a ufunction with that name ke ...

Spot Light USD Export Produces Incorrect Intensity Values Based on Cone Angle and Source Radius

UPDATE: Should be fixed as of CL#52537078 (fb7af1) USD: Bake all frames of exposure animation tracks. When exporting Unreal Engine spot lights from a level to USD, lights with identical EV intensit ...

[StateTree] Cannot use SetLinkedStateTreeOverrides if the linked asset uses the same schema with a parent context data class of the root tree.

If both assets have the same schema (StateTreeComponentSchema), but the root tree has the Context Actor class set to Character and the linked asset is using a Context Actor class of Pawn. So the sch ...