magcms/prosopopee/themes/material/templates/sections/pictures-group.html

<div class="container">
    <div class="row baguette">
        {% for line in section.images %}
        {% for image in line %}
        {% set caption = image.text %}
        {% set image = Image(image) %}
        {{ image.copy() }}
        {% set plop =  12 // loop.length %}
        <div class="col m{{ plop }} l{{ plop }}">
            <div class="card">
                <div class="card-image caption">
                    <a href="{{ image }}" {% if caption %}data-caption="{{ caption }}"{% endif %}>
                        <img class="responsive-img" src="{{ image.generate_thumbnail("x600") }}">
                        {% if caption %}
                        <div class="caption__overlay card-panel center">
                            <h5 class="black-white">{{ caption }}</h5>
                        </div>
                        {% endif %}
                    </a>
                </div>
            </div>
        </div>
        {% if not loop.last %}
        <div class="separator"></div>
        {% endif %}
        {% endfor %}
        {% endfor %}
    </div>
</div>