Which resolution is used when "Auto (Best Performance)" is selected?

In the studio I work for, we’re developing a game for iPhone and iPad, and I’m seeing that the art team is using very large textures for the GUI. They say it’s because they want the textures to look good on a retina iPad, but our player settings are configured to automatically choose a resolution (the “Auto (Best Performance)” setting).

Which resolution does Unity choose on a retina iPad when “Auto (Best Performance)” is selected? If it’s less than 2048x1536, then I can go to the art team and ask them to resize our textures and gain some memory back.


It sets it to 75% of the actual screen resolution.