Unreal Engine Issues

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

App fails to open on Android: Assertion failed referencing LaunchAndroid.cpp:415

AR App fails to open on Android: Assertion failed referencing LaunchAndroid.cpp:415 when Unreal Datasmith is installed.10-11 11:22:57.499: D/UE4(18917): LogAndroid: Error: Assertion failed: false [F ...

[Mac][Metal] (Motion Vector) Rendering artifacts with 4.11 on Mac with Accurate Velocities from Vertex Deformation and Selectively output to the GBuffer rendertargets ON

From AnswerHub: Second one is that Motion Vectors are bugged for some objects. This causes lot's of temporal artifacts. Third picture lamp is good example of bug. Lamp is static. Camera is not movin ...

iOS Metal-based build crashes at launch with sub-levels.

Application crashes when deploying a game to iOS with Metal enabled. This has only been reproduced if a sub-level has been added to the starting level within the project. This seems to only happen ...

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 ...

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 ...

Crash with Particle system using Beam data

Attached to this ticket is a project with an asset that uses a beam type that is causing a crash when trying to open the asset in 4.11 and 4.12 (MAIN). When trying to recreate the asset there is no ...

r.ScreenPercentage.Editor does not function

Setting r.ScreenPercentage.Editor does not affect the upsampling/downsampling of the viewport in the editor. Regression: YES - the console command correctly adjusted the screen precentage in 4.11.2 ...

Nanite meshes are lit differently in Actor Colorization view modes than non-Nanite meshes

When the Lit > Actor Coloration > Affects Navmesh or other Actor Coloration mode is used, Nanite meshes apply lighting differently than non-Nanite meshes which can make it difficult to use the Actor ...

Crash when removing cloth apb's assigned to asset

When removing already assigned cloth asset from a skeletal mesh it will crash the editor. I was able to reproduce this with the Owen asset from Content Examples, but was unable to get it to work fro ...