Render in higher resolution than fullscreen / monitor

[TehGuy]

Best you could probably do is raise the IR to x6 via the game's .ini file

https://forums.dolphin-emu.org/Thread-unofficial-howto-using-gameini-settings-per-game

Quote:Choosing Internal Resolution:
The line below is used to enforce an integral value closest to the general value you use, if 3x is used it will stay the same, if 2,5x is used it will drop to 2x, if auto fractional is used auto integral will be set:
[Video_Settings]
EFBScale = -1
Values starting from 0 represent the drop down order in the list that dolphin uses. Currently:
[Video_Settings]
EFBScale = 0 =>will give auto fractional
EFBScale = 1 =>will give auto integral
EFBScale = 2 =>will give 1x
EFBScale = 3 =>will give 1,5x
EFBScale = 4 =>will give 2x
EFBScale = 5 =>will give 2,5x
EFBScale = 6 =>will give 3x
EFBScale = 7 =>will give 4x
Since 4.0-3471 you can use even higher values...
EFBScale = 8 =>will give 5x
EFBScale = 9 =>will give 6x
EFBScale = 10 =>will give 7x etc.

However, all these shots are gonna be at whatever the current desktop resolution is set at unless you're able to force it higher via Nvidia Control Panel or AMD's CCC (I think). Dunno if there's a way for Intel's iGPUs

EDIT: How to on AMD: http://forums.guru3d.com/showthread.php?t=366244