Hello, Meian
To get a quality screen shot UE4 has a feature called High Resolution Screenshot. This allows the user to take screen shots at incredibly large resolutions if desired in order to capture the finite details in your levels.
In order to take a High Resolution Screenshot, go into your active perspective viewport and next to the perspective view option there is a small downward facing arrow to the left. Click on the drop-down box and and find “High Resolution Screenshot.” This will open up a prompt with various options for the screenshot.
High Resolution Screenshot Documentation: Taking Screenshots in Unreal Engine | Unreal Engine 5.1 Documentation
I hope this helps!