Looping through all Images in Page Folder

@nembgen Here is a small sample that might send you in the right direction.

Say you have a modular page with template 'templates/modular.html.twig', which loops through all child modules for the modular page:

...
{% for module in page.collection() %}
    <div id="{{ _self.pageLinkName(module.menu) }}"></div>
    {{ module.content }}
{% endfor %}
...

And you have a folder like:

pages/
  01.home/
    _slider/
      image1.jpg
      image2.jpg
      ...
      slider.md
    _other_modules
      ...

Then the following template 'templates/modular/slider.html.twig', will loop through all images in folder '_slider':

{% for image in page.media.images %}
    <img src="{{ image.url }}">
{% endfor %}