Unreal Engine Issues

Global illumination Postprocess settings doesn't affect Reflection on Mobile

Postprocess GI related settings look like working in 4.22 on Mobile now, but seems buggy, Not sure if it has supposed to be supported on Mobile since it has no any info in Doc or 4.22's release note ...

Editor crashes when using decal material on Instanced Static Mesh with Raytracing

This issue can occur when setting the Decal Material to Instanced Static Mesh in a Raytracing enabled project. (If there is a cache, it will not crash.) The cause is that DefaultDeferredDecalMateria ...

Scene capture allocate internal render target

Ambient Cubemap Assignment in Post Process Volume does not work with Forward Renderer

The Ambient Cubemap assignment in a Post Process Volume doesn't work when using the Forward Renderer. I want to note that Cubemap assignment in the Skylight does work. I checked this just to make s ...

Find Materials Does Not Import Materials for Alembic or Geometry Cache File

Alembic file materials do not import into the editor when Find Materials is selected. -Create Materials is also not creating materials for imported ABC asset. -Asset was created in Maya 2016, unwr ...

Mesh from attached USD fails to import

UDN customer reported this issue: Using legacy USDImporter, the attached USD throws these ensures ensure(Primvar.Get(&UVs, Options.TimeCode)); ensure(Primvar.GetIndices(&Indices, Options.TimeCode) ...

Loops don't work with SimpleParallel BT composite node

Loop decorators don't work with SimpleParallel BT composite node. We need to either fix it, or if we remove support for it restrict users from putting these decorators on SimpleParallel's children. ...

Objects with QueryOnly collision push Physics objects

From UDN: We are having an issue where a cube physics actor simulating physics is being pushed around by a characters character mesh while walking around on top of it. If i set the character mesh ...

Blueprint actor reference breaks after hot reload

Reference to a blueprint based on a custom class will break if changes are made to the parent class and a hot reload is performed. Error Displayed added to Callstack section. Workaround: Compiling ...

Behavior tree subtree switch reported as hitching

Setup described in UDN post: parent tree: root - selector - run behavior task subtree: root - sequence - custom BP task with just print string repro: print string message (engine tick) is showing u ...