Unreal Engine Issues

Using a Shading Model node set to Unlit results in an invalid material with FromExpression domain

Create a materialSet its domain to From ExpressionRecreate the node graph as in the screenshot Note that the preview sphere is black. ...

"Build All Levels" does not re-AddNavigationSystemToWorld

The Build All Levels editor action cleans up the world's NavDataSet (UNavigationSystemV1::NavDataSet) as pre-rebuild world cleanup by calling: SetNavigationSystem(nullptr); inside UWorld::Cleanu ...

Physical Material Mask does not return the correct value

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 ...

Placing a section at the end of montage is not properly handled

Placing a  section at the very end of a montage with no duration or animation assigned after it is not properly handled.  Normally sections with 0 length are skipped and search continues since they ...

Windows Metal Shader Compiler creates invalid shaders for iOS

When installed app is started on device, log will say there's missing or invalid metal shaders ...

Gameplay Ability System Attribute Modifiers with a duration (including infinite) do not respect tag requirements

When using infinite or duration-based effects, required and ignored tags will have no effect on attribute modifiers. This appears to be caused by OnAttributeAggregatorDirty (GameplayEffect.cpp:2917) ...

Auto Exposure Compensation Curve issue when switching from Manual to Histogram

When switching the Camera's Exposure Metering Mode from Manual toHistogram, the exposure level resets and takes time to settle. The Licensee has a proposed code change that would fix this issue. Als ...

Cumulative Patching does not work with Pak signing

Cumulative patching is implemented by copying the generated pak files during staging of the base and each patch to the Releases directory. When creating a patch, all of the pak files from the releas ...

Copied Actors in World Partition Levels Maintain References to Actors They Are Copied From

When an Actor is duplicated in the editor inside a world partition level it maintains references to the Actor it is a copy of. This can cascade, i.e. Actor C, which is a copy of Actor B which is a c ...