Unreal Engine Issues

Instance's parameter value for Child BP is not reflected in cooking if parent is nativized

If an instance of a child BP has a non-default value for its parameters, that value will be ignored in the cooking process if the parent BP is nativized but the child is not and the default value fr ...

Fix up IOS errors calling UI API from non-UI threads

Crash when using Vertex painter with material including cubemap texture sampler

Engine crashes when static mesh have material with cube sampler in vertex painter mode. Simply DaylightAmbientCubemap_Mat have texture cube as texture sampler. This is not reproduced in 4.15 versi ...

Editor crash when opening Project Settings on Linux

When the Project Settings is opened on Linux, a call is made to run an iOS-related C# program (execute iPhonePackager certificates). This call causes the editor to crash. Unable to find mention of ...

Reimporting Duplicated Mesh from Blender Creates Merged Meshes

When a mesh in Blender is Duplicated and exported as an FBX, then imported into Unreal with Combine Meshes unchecked, then both meshes reimported, one of the meshes has another mesh added to it. The ...

Show Collections shows up twice when box is checked and multiple content browsers

When you have 'show collections' checked off and you open up an additional content browser, 'show collections' shows up twice in the menu. ...

Print String duration divided by number of players

Print string duration is divided by number of PIE players. ...

Second controller input doesn't work setting client mode on PIE.

When two controllers connected, player2 input is disabled in client mode in PIE. It worked correctly in 4.25, but it has been wrong since 4.26.  Digging into FSlateApplication::ProcessKeyDownEve ...

Crash when reopening a project that has a Child Actor component in a BP with a WaterBody class set as the Parent Class

When adding a child actor component to a Blueprint with the Parent Class set to one of the new Water classes and then placing it in the world, the project will crash on open. This was tested with th ...

SetMasterPoseComponent overrides any SetMorphTarget operations

Using Set Master Pose Component overrides any Set Morph Target operations on the slave component. ...