Unreal Engine Issues

Array of structs does not animate sub properties correctly in Sequencer.

Support for animating arrays of structs should either be disabled, or supported. ...

Changing a push model property without marking it as dirty can cause desync when the actor goes in and out of dormancy

When the actor goes out of dormancy, it will replicate its push model property, even if it hasn't been marked as dirty. In this case, it seems the value of the property is not written to the shadow ...

Substrate- black outline appears when using sharp contrast mask to blend slabs

Substrate materials have a thin border of black pixels between slabs. These lines can be made more apparent by changing the Diffuse Albedo color of the two slabs to pure white. This will remove the ...

Subsurface Scattering Checkerboard with SceneColourFormat 3 (High Scalability) leads to a visual artefact when temporal upscaling is in use

Primarily visible at very low internal resolutions (25-33%), the SSS checkerboard with an RGB scene colour format (r.SceneColorFormat 3) causes a double-image artefact both internally and on the sil ...

Check for sRGB on Normal and Mask samplers instead checks against Greyscale and Alpha samplers

In FMaterialInstanceEditor::RefreshOnScreenMessages, there is a check for sRGB on Normal and Mask samplers. The issue is the check uses a TextureCompressionSettings enum cast to EMaterialSamplerTyp ...

Niagara Editor Viewport will crash when rendering opaque materials with Mobile Multi-View and Mobile Vulkan Preview Enabled

The Niagara viewport will crash when rendering opaque sprites if Mobile Multi View and the mobile preview are enabled. Additive materials do no crash, and if the viewport is not set to lit it does ...

Dark square appears in hair in direction of spotlight when shadows disabled

A dark square appears in the direction of a spotlight on hair when the spotlight has no shadow. [Image Removed] In UE 5.4 the dark square is visible when the spotlight has no shadow, and a light s ...

Iris - Fast Array ItemMap is empty in PostReplicatedAdd

With Iris enabled, the ItemMap is populated correctly only on the next frame, but it is empty during the callback. This differs from the behavior of the current system, where the ItemMap is populat ...

Default subobject of dynamic component skips initial replication

Because the component's subobjects are replicated before the component, the content block for the subobject is received before the component has been created on the client. Since this subobject is c ...

PoseSearchDatabase indexing doesn't account for sequences "Rate Scale"