um_multichar

In config.lua

Config.Clothing = 'rcore_clothing'

In config.lua, find this code block and add the two lines prefixed with "+" (don't add the plus signs)

Config.ClothingExports = function(cacheped, skinData) -- If you don't have a custom event or export, leave this part
    if Config.Clothing == 'illenium-appearance' then
        exports['illenium-appearance']:setPedAppearance(cacheped, skinData)
    elseif Config.Clothing == 'bl_appearance' then
        exports.bl_appearance:SetPlayerPedAppearance(skinData)
+   elseif Config.Clothing == 'rcore_clothing' then
+       exports.rcore_clothing:setPedSkin(cacheped, skinData)
    elseif Config.Clothing == 'fivem-appearance' then
        exports['fivem-appearance']:setPedAppearance(cacheped, skinData)
    elseif Config.Clothing == 'qb-clothing' then
        TriggerEvent('qb-clothing:client:loadPlayerClothing', skinData, cacheped)
    elseif Config.Clothing == 'crm-appearance' then
        exports['crm-appearance']:crm_set_ped_appearance(cacheped, skinData)
    elseif Config.Clothing == 'custom' then
        Debug('You can add your own clothing exports here.')
    end
end

In framework/getSkin.lua, find this code block and add the lines prefixed with "+" (don't add the plus signs)

    lib.callback.register("um-multicharacter:server:getSkin", function(_, cid)
        if selectedClothingMenu == 'bl_appearance' then
            local appearance = exports.bl_appearance:GetPlayerAppearance(cid)

            if not appearance then
                return nil, nil
            end

            return appearance.model, appearance
        end

+        if selectedClothingMenu == 'rcore_clothing' then
+            local skin = exports.rcore_clothing:getSkinByIdentifier(cid)
+            if not skin then
+                return nil, nil
+            end
+            return skin.ped_model, skin.skin
+        end

        local skinQuery = MySQL.single.await('SELECT * FROM playerskins WHERE citizenid = ? AND active = ? LIMIT 1',
            { cid, 1 })

        if skinQuery ~= nil then
            local skin = json.decode(skinQuery.skin)
            return skinQuery.model or skin.model or nil, skin
        end

        return nil, nil
    end)