[realwx]

I'm a bit confused here. I'm trying to add a particle effect (134 ; X), but every method I do just replaces all of the attributes of the weapon instead of keeping them and adding one more.

stock GiveNewWeapon(client, itemIndex, attribute, String:classname[], slot)
{
    new Handle:newItem = TF2Items_CreateItem(OVERRIDE_ITEM_LEVEL | OVERRIDE_ITEM_QUALITY | OVERRIDE_ATTRIBUTES | PRESERVE_ATTRIBUTES);
    TF2Items_SetItemIndex(newItem, itemIndex);
    TF2Items_SetLevel(newItem, 100);
    TF2Items_SetQuality(newItem, 6);
    TF2Items_SetAttribute(newItem, 0, 134, float(attribute));
    TF2Items_SetNumAttributes(newItem, 1);
    TF2Items_SetClassname(newItem, classname);
    TF2_RemoveWeaponSlot(client, slot);
    new entity = TF2Items_GiveNamedItem(client, newItem);
    EquipPlayerWeapon(client, entity);
}

What do I modify to keep the weapon's attributes (like FaN keeping FaN attributes) and add on the particle effect? I've tried with and without OVERRIDE_ATTRIBUTES and nothing works.

[Powerlord]

PRESERVE_ATTRIBUTES only works if you're modifying an item in the TF2Items_OnGiveNamedItem callback. I use it in the Pyrovision plugin to add attribute 406 to all items, for instance.

Otherwise, if you're creating an item from scratch, you have to set all the attributes for it.

[realwx]

Ah, that's a shame. Thanks.