Unreal Engine Issues

Meshs in a hidden sublevel may generate incorrect navmesh

If the level has hidden sublevels, the regenerated navmesh result appears to have a hidden sublevel mesh placed at the origin. Apparently, the reason is that bNavigationRelevant is no longer consid ...

Copying an InstancedStaticMeshComponent does not render correctly

Default values specified for local BP variables of type DateTime and Timespan don't actually work

Have attached examples of this in action, including breakpoints showing the FDateTime::Ticks count as zero. Also showed that this is an issue for the existing GetYear/GetMonth/GetDay methods (and an ...

Android build fails with GPU Lightmass plugin enabled

Packaging for Android fails with the GPU Lightmass plugin enabled. A customer reported this and I was able to successfully repro it, however my callstack was different. I'm attaching my logs and cal ...

RVT Material Preview incorrect in Landscape paint target layers

Cook errors with Python developer mode enabled (deprecated imp module)

Missing scale for tangent with morph target

There is a bug in the fbx curve import code where we do not multiply the tangent by the scale parameter. Only the key value is currently scale. In 4.25 there was a hardcoded 0.01 scale but it was w ...

Movie Render Queue renders are not displaying Landscapes

When creating a Movie Render Queue render with a landscape the render does not display the landscape. This issue is occurring in 4.26 Binary CL 14627614 This issue is NOT occurring at 4.25. Binary ...

Naming a variable 'LifeSpan' causes the default value to be reset after closing the editor

Customer reported this issue in Salesforce. I repro'd this issue in 4.25.3, 4.25.4, and 4.26. Therefore marking it as not a regression. Renaming the variable something like "LifeTimer" does not res ...

Struct Viewer will display duplicate structs after a rename

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