Unreal Engine Issues

Color changing through material parameter collection in a emissive material will not affect lightmap baking, unless recompile the material.

Refraction does not display properly on Android devices

A user has reported that Refraction does not affect Translucent or Masked materials at all on Android. It is also limited in how much it affects Opaque materials. Regression?: No This has been test ...

Crash on Adding Elements to Array On Instance of Actor in the Level

When attempting to add an array element to an array that exists on a component contained within an actor that is instanced in the level, the editor will crash. This does not occur if an array elemen ...

RadialForceComponent ignores collision of Object Type set in Collision Presets if component is initialized in C++

When a RadialForceComponent is attached to a object in C++, it doesn't take on the "Object Types to Affect" in the component settings of the Blueprint. If the RadialForceComponent is created as a co ...

Containers of Instanced Subobjects don't inherit as expected

Changes made to array containers in the parent Instanced Subobject Blueprint does not affect the child. Working in 4.18.3 Broken in 4.19.2 Tested in  4.18.3(CL - 3832480), 4.19 (CL - 4033788), 4. ...

Opening Materials and Material Functions with Vertex Interpolator node Results in Crash

Per Licensee: Hello, We are migrating our project from 4.18 to 4.19.2 and we are encountering various crashes while opening our material and material functions. I'm adding a simple test case here. ...

Line trace fails to detect Destructible Mesh

When using a line trace in the construction script so that objects can return a value destructible meshes will not return a hit. This does not affect use in game with PIE or Standalone game, but if ...

Jittering effect with Physics Constraint Actor using Linear Limits

Jittering effect with Physics Constraint Actor using Linear Limits. This only seems to affect the Physics Constraint Actor from the Modes panel, with the static mesh starts near the physics constrai ...

Landscape Change Component Size Tool removes foliage from landscape

Foliage painted onto a landscape will disappear when Sections per Component is changed from 1x1 to 2x2. Affects 4.17.2 CL 3658906, 4.18.2 CL 3794801, 4.19 Main Possible Workaround is to set the Re ...

Enabling "Include app-local prerequisites" does not work - Causes errors or warnings

Enabling the "Include app-local prerequisites" causes errors or warnings to appear when packaging. 4.17 error:Packaging (Windows (64-bit)): Program.Main: ERROR: AutomationTool terminated with exce ...