Unreal Engine Issues

Crash if editing the key properties of a collapsed key that has only 1 channel keyed

Unable to affect setting cubemap blend in skyLight and reflections on transluscent materials

Attempting to blend SkyLight Cubemaps via the SetCubemapBlend function to blend between different Cubemaps to make the changes seamless is not reflected. As a workaround, in LumenTracingCommon.ush, ...

5.8 Run Construction Script in Seqeuncer hiding control rigs

Controls don't display in viewport if the container blueprint has "Run Construction Script in Sequencer" enabled. We've also noticed spawned control tracks temporarily disappearing from sequencer. ...

Crash when removing and re-adding instances to an InstancedStaticMeshComponent with PerInstanceCustomData.

When using an InstancedStaticMeshComponent with PerInstanceCustomData, the number of float elements in the "Custom Data" array should always be equal to NumCustomDataFloats multiplied by the number ...

Classes in TargetDenyList modules are still referenced from Components on BlueprintGeneratedClasses and cause runtime warnings

Other than the presence of the error and the performance cost of looking for a package on disk that does not exist, there are no behavioral problems. When running with legacy (non-iostore) pakfiles ...

ARSharedWorld, AREnvProbe, and ARSaveLoad fail to build for iOS with clang error

ARSharedWorld fails to package at the build command for iOS with the following messages. Packaging (iOS): [1/4] sh /Volumes/Storage/Workspaces/Release/Samples/AR/ARSharedWorld4.23/Binaries/IOS/ARS ...

Nanite TwoSidedSign is backwards

The value of MaterialExpressionTwoSidedSign is flipped when calculating the Opacity Mask for Nanite meshes. This seems to be a regression in 5.5. ...

New Docker image for latest horde has no bundled installers

Source UDN [Link Removed] & [Link Removed] & [Link Removed] We need to produce a docker image that contains latest bundled installers for 5.5.2 (or 5.5.3?). ...

Burn ins are not composited onto media renders using the MRQ

In 5.1 media exports will not have the burn in composited onto them.  ...

Volumetric Clouds High Quality Aerial Perspective Issue

There is a workaround to set r.VolumetricRenderTarget.Mode=1. The lines appear to be coming from the temporal component of the Volumetric Clouds. Each frame, the lines are merged in from the previou ...