This works for some, others it does not, and will default back to a setting to match their in game panel graphic settings, so in order to get it to stay at 1, they have to go to the in game panel, and adjust their graphics/textures to a higher level.
The biggest problem with forcing it to 1 is it causes people with lower end machines to have such a low FPS that it makes the game unplayable.
I checked in the cfgs for both PBBans, and PsB, and that particular cvar check, and one other have been removed, unless I am mssing them.
TWL forces it to be "IN 1", but we are trying to get them to change their cfg to allow a setting of 2 and write their cfg to read "IN 1 2"