I heard that Divinity 2 uses the gamebryo engine which is used by Bethsoft for Oblivion and Fallout 3, but in both games there was an .ini file to change the graphic parameters.
Why, there is: c:\Users\%username%\AppData\Local\Divinity 2\Profile\
where C:\ is a system drive (D:\, whatever) and %username% is your account name.
The problem with D2 configs is that it is not like Oblivion/Fallout3, there is not so much options you can tweak manually.
