{% macro renderChildren(children) %}
    {% if children|length > 0 %}
        <ul style="margin-left: 20px;">
            {% for child in children %}
                <li>
                    {{ child.title }}
                    {# Pour afficher les sous-sous-albums #}
                    {{ _self.renderChildren(child.children) }}
                </li>
            {% endfor %}
        </ul>
    {% endif %}
{% endmacro %}

{# Affichage principal #}
{% import _self as macros %}
<div class="album-children">
    {{ macros.renderChildren(value) }}
</div>