Unreal Engine Issues

MaterialInterface is not exported and therefore it's functions are not accessible

MaterialInterface which is a base class for other classes (such as UMaterialInstanceDynamic) is not being exported which causes compiler errors when a user attempts to access the functions of this c ...

Full screen mode when using a laptop with Optimus ignores the gama setting

When using full-screen mode on a optimus laptop the gama that is set for the system appears to be ignored and uses the default setting, even if it has been adjusted in Windows display calibration se ...

Can't connect nor send packet via TCP socket in iOS

TCP Socket messaging in iOS seems not working.  ...

Pasting timeline components into another actor and then choosing "cancel" on fix self context function references results in a broken state

upd. Regression was checked on //UE4/Release-4.26 CL 15973114, issue was reproduced. Regression - No ...

Lumen Software Raytracing has big lighting difference comparing to Hardware raytracing

It is possible for PreLoadScreen to leak memory when an EngineLoadingScreen returns IsDone while still loading

It is possible for a class that implements IPreLoadScreen to leak memory if GetPreLoadScreenType returns EngineLoadingScreen and IsDone returns true before the engine signals loading is completed vi ...

Conflicting FName for components freezes the editor with no warning

If two code components have the same TEXT("") name in the CreateDefaultSubobject call the code will compile correctly but the editor will freeze when adding an instance of the class or classBP to th ...

Refraction not calculated when using Material Property Overrides Blend Mode

Found in the process of replicating the linked Answerhub. When an opaque material is setup as a master material with the intent to have an Opaque and Translucent version, the material instance will ...

Non-Local Players Cannot Hear Opponents Footsteps in Shooter Game

Non local players cannot hear opponents footsteps and other various notifies, however, other sounds such as gunfire, etc. are present. Regression: User reports this issue is not present in the 4.8 ...

animations played on server skip every second frame

Animations played on server skip every second frame. *See attached image. ...