Unreal Engine Issues

Tilemaps with masked materials respond to lighting at incorrect directions

Tilemaps using lit methods of rendering are subject to strange lighting behavior. If the material for the tilemap is using a 'masked' method of rendering.  Lighting will appear at incorrect angles. ...

Capsule Shadows Not Visible When Using Movable Skylight With Bright Lower Hemisphere Color and Indirect Lighting Cache

I have managed to reproduce this issue in 4.18.3 and 4.19.2. In order to make the Capsule Shadow disappear:Indirect Lighting Cache must be used (Volumetric Lightmap works)Skylight must be set to 'M ...

Lighting Build fails with World Settings Error

Lighting Builds seemingly successfully but produces a Map Check Error for World Settings. There are several things that can be done to "eliminate the issue" and I have separated them into different ...

Private functions can be overriden in the "My Blueprint" tab

Discovered during investigation of [Link Removed]. This is happening because we are not filtering out private parent functions in SMyBlueprint::BuildOverridableFunctionsMenu. With any fix that is ...

SceneTexture:WorldNormal Expression failing to Compile in World Align Blend Function

While attempting to modify the World Align Blend function in order to map decals to a surface based on a world vector input, I discovered the function fails to compile while passing the SceneTexture ...

Delegate fixup doesn't work when bound functions are not in the current BP

When BP functions are bound to native delegates with float parameters, we perform fixup on the BP functions such that their float parameters are converted from double precision to single precision. ...

Calling a parents function that is used in a child blueprint from a spawn actor from class node that is being called back in the parent will cause an error

If the user calls a function (We will call it "Parent's Function") from a child blueprint and then turns around and tries to call that implementation of the Parent's Function with in the parent it's ...

Stationary Sky Light has double lighting contributions to StaticMeshActor on MobilePlatform

Incorrect number of parameters in empty Shipping version of the DrawDebugString() function signature

The DrawDebugString() function has to versions. One is the actual function to display a string of debug text in non-Shipping builds, and the other is an empty function that is used in Shipping build ...

Blueprint deleting Variables, kills function parameter shortcuts with same name

When deleting a variable that shares a name with a function parameter. The references to the function will be deleted as well. ...