Modding in a culture that allows agnatic-cognatic/matrilinial marriages even when muslim?

[malta3]

Would that be possible, or would the religion itself have to be changed for that?

I have conclave, but usually play without it because I don't really enjoy it.

 

[Dreamsbird]

it cant be possible to change culture file
look like make decision or add event file or edit 00_religion file

agnatic-cognatic -> make decision file like this . . .

decision file . . . .

    make_cognatic = {
        filter = owned
     
        from_potential = {
            ai = no
        }
        potential = {
            is_titular = no
            temporary = no
            higher_tier_than = COUNT
            NOT = { has_law = cognatic_succession}
        }
        allow = {
            always = yes
        }
        effect = {
        gender_succ = cognatic
        }
        ai_will_do = {
            factor = 0
        }
    }

or add event file like this

character_event = {
    id = changesuccussion.1
    desc = EVTDESC_change_succussion_1
    picture = "GFX_evt_council"
    ai = no // if change to yes ai also use this event
 
    trigger = {
        AND = {
            is_ruler = yes
                OR = {
                    top_liege = { has_law = any_succession(not cognatic) }
                }
                NOR = {
                    has_law = cognatic_succession

            }
        }
    }  
 
    mean_time_to_happen = {
        months = 1
    }
 
    immediate = {      
        primary_title = {
            add_law = cognatic_succession
        }
    }
 
    option = {
        name = OK
    }
}

and muslim matrillinial marriages
go ck2/common/religions -> 00_religion.txt

and find muslim and edit like this

muslim = {
    has_coa_on_barony_only = no
    graphical_culture = muslimgfx
    crusade_cb = crusade
    playable = yes
    hostile_within_group = yes
   
    ai_convert_same_group = 2 # always try to convert
    ai_convert_other_group = 1 # try to convert if ai_zeal is high
    ai_fabricate_claims = no
   
    color = { 0 0.6 0 }
   
    # Names given only to Muslim characters (base names)
    male_names = {
        Abbas Abdul Abdullah Abolhassan Abu-Bakr Ahmad Akbar Allahyar Ali Ali-Fay Ali-Kolon Ali-Zalil Hasan Hossein Hussayn Ismail Mahmud Mohammed Muammar Muhammad
    }
   
    sunni = {
        graphical_culture = muslimgfx

        icon = 3
        heresy_icon = 8
       
        color = { 0 0.6 0 }
       
        crusade_name = JIHAD
        scripture_name = THE_KORAN
        priest_title = IMAM_PRIEST
       
        high_god_name = GOD_ALLAH
       
        god_names = {
            GOD_ALLAH GOD_THE_GREATEST
        }
       
        evil_god_names = {
            IBLIS SHAYTAN
        }
       
        can_call_crusade = yes
        priests_can_marry = yes
        psc_marriage = no # Disallow uncle-nice and aunt-nephew marriages
        max_wives = 4
//////////////////////////////////////////////////////////////////
        matrilineal_marriages = no  ///////////////////////// change no to yes
/////////////////////////////////////////////////////////////////       
        landed_kin_prestige_bonus = yes
        attacking_same_religion_piety_loss = yes
        uses_decadence = yes
        uses_jizya_tax = yes
    }