Unity removed this feature long ago. Now we need to make in-game options. Ilwe won't be doing that for this title since it's old and such.
That explains why the CLI option to force it doesn't work. Thanks for explaining.Maybe that explains why The Long Drive is so glitchy. That offers the prefs window at the start so must be using an old build.
OK looks like it is res-o-matic for the win.
