Hello 

I would like to know how to make a black and white vision like Ascension from BO1 and then back to colors after activating the power switch ?

I try to find it for a long time 

I believe the method used is by setting the vision files. There are tuts on modifying vision files on UGX. You will also find in laststand and in your mapname.gsc vision file lines. You may first try to work with the laststand vision file, and if that doesn't meet what you are going for, make your own. Your script would be a simple, set_all_players_visionset( "laststand", 0.1 );, flag_wait("electricity_on");,set_all_players_visionset( "zombie_factory", 0.1 );.

Something like:

PowerVision(){
	flag_wait("all_players_connected");
	set_all_players_visionset( "laststand", 0.1 );
	flag_wait( "electricity_on" );
	set_all_players_visionset( "zombie_factory", 0.1 );
}

The actual vision used in Ascension is cheat_bw.vision

Isn't there a Dvar that does this ???

normally you should add this to nazi_zombie_???.gsc:

colour()
{
   flag_wait("all_players_connected");
   set_all_players_visionset( "_bw", 0.1 );
   flag_wait("electricity_on");
   maps\_utility::set_all_players_visionset("zombie_factory", 0.1);
}

in bottom of file

and add

                  thread colour();

before

maps\_zombiemode::main();

and move "_bw.vision" from bo1 mod tools to your cod5 mod tools and don't forget to include them in your mod.csv ^^