Unreal has redrawn all the Windows’s window elements, but they did not add window shadows. When you want to use a flat theme, the editor window becomes difficult to distinguish the boundaries.
This plugin has hacked their implementation to bring back the system window shadows while removing their rounded corners. Additionally, it speeds up the response time when opening windows.
Currently, there is a BUG in it, when maximized, it will display in full-screen mode(Fixed).
Here are my two themes, which remove the original editor’s border and rounded corners, using shadows to distinguish windows.
Update
Bug fixed and enabled for menus.
