Unreal Engine Issues

HLOD visibility state isn't cleared when changing scene

HLOD state is not cleared when moving to a scene without HLOD so primitives may read the state from the old scene and incorrectly cull objects. The safe fix is to clear the HLOD state maps when the ...

When a client sends an Unreliable RPC to the Server in same frame with a Reliable RPC, Unreliable RPCs are Reliable

When a client sends an Unreliable RPC to the Server in same frame with a Reliable RPC, Unreliable RPCs are Reliable. It implies extremely high lag on each lost RPC and all following ones. User lose ...

InstallVisualizers.bat does not install debug Visualizers for Visual Studio 2017

The InstallVisualizers.bat file for 4.20 does not include a way to install the Visualizers for Visual Studio 2017. With Visual Studio 2017 now the default Windows IDE for the Engine, it may be helpf ...

SketchUp models are too small once imported via the Datasmith plug-in

In Sketchup the user made a cube thats 100cm x 100cm x100cm and has Sketchup's measure units set to cm. When imported into DataSmith the cube is 39x39x39. It was calculated that the scaling was off ...

Missing Service Node warning when opening project

Services in the Behavior Tree sometimes don't work when the project is first loaded. The Behavior Tree will print a "missing service node" warning and the BT will remain inactive. This was reported ...

MSAA depthbuffer never be released on Android

Object Type (Collision presets) not updating immediately after toggling 'Simulate Physics'

Collison -> Collision Presets -> Object Type does not immediately update when toggling simulate physics. Tested in Main CL 4374913 ...

Allow multicast RPCs to be recorded by replays in NM_Standalone

No game net driver exists in a standalone game, so there is currently no code path to forward multicast RPC calls to the demo net driver for recording. ...

Resizing the Editor window causes flicker effect

Resizing the Editor from 3 out of the 4 corners causes a flicker effect on the Editor window. The bottom right corner works normally but the other corners causes flickering. Link to video example:  ...

Blueprint Static Meshes lose Vertex color information in Standalone/Release

In the editor, vertex information can be painted on static meshes that are part of a blueprint. When testing by playing in “Selected Viewport” the painted vertex information is correctly saved and d ...