Fallout 3 G.O.T.Y (GOG) resolution limited to 720p?

While otherwise the script performs ok, I was wondering is it possible to run Fallout 3 in higher resolution than 720p? According the information provided in the description of the script:

  • Don’t run the game in windowed mode, instead just change the resolution.
  • Fakes a Nvidia GPU for Intel support (gpu autodetect doesn’t work here)

Which is detected by Fallout 3 as NVIDIA Geforce 8600 GT and the maximum resolution is 1280x720. My actual gpu is 750 Ti 2GB. Editing FalloutPrefs.ini’s iSize H/W doesn’t help.

You have to go to the Lutris settings of the game (small gear) to Runner Options and set to the desired resolution.