Hey can someone help me to add ashes into the map kinda like slums?

Looks Like This!

find the fx name using the effect editor. and then spawn it in your map.

in mapname:

preCacheMyFX(){
	level._effect["NAME"]			= loadfx( "PATH" );
}

in zombiemode/mapname (personal preference)

spawner = getEnt("fx_spawner","targetname");
PlayFxOnTag( level._effect["NAME"], spawner, "tag_origin" );

this script would spawn a fx on a model with the targetname fx_spawner. i recommend using the model tag_origin because its invisible and non-colliding

if that doesnt work, try http://www.zombiemodding.com/index.php?topic=4811.0

k thx I'll test it when i can!