I'm not 100% sure what toggle_fow does, but guess it's the command to reveal the entire campaign map... in which case the MTW equivalent is: .matteosartori. typed in at the campmap - it is not a 100% reveal - you can see all provinces and stacks etc, but you cannot see what's in a stack, although you can read the general's parchment, and you cannot see the buildings in a province. But you can see who owns what and where the armies are