how to set internal resolution to 4k?

[datemasamunex]

is there no option you can manualy set the internal resolution with?

[Kodiack]

You can set the internal higher resolution for games above what the GUI allows by adding a line to their INI files. Check out this forum thread for information on handling INIs, particularly under the "Choosing Internal Resolution" section.

[JMC47]

I'd recommend using the INI to put in higher internal resolutions.

[kirbypuff]

Option #1: Auto (Multiple of 640x528) in the graphics settings

or

Option #2: "EFBScale = 9" in the .ini