WordPress + Timber example

overview.php

<?php
/**
 * Template Name: Overview
 */

if (!class_exists('Timber')){
  echo 'Timber not activated. Make sure you activate the plugin in <a href="/wp-admin/plugins.php#timber">/wp-admin/plugins.php</a>';
  return;
}

$data = Timber::get_context();
$post = new TimberPost();

$data['post'] = $post;

$args = array(
  'post_type' => 'custom-post-type',
  'orderby' => 'post_title',
  'order' => 'ASC',
  'post_status' => 'publish',
  'posts_per_page' => -1
);

$data['posts'] = Timber::get_posts($args);

Timber::render('overview.twig', $data);

overview.twig

{% extends 'base.twig' %}

{% block content %}

<ul class="o-list--basic">
  {% for item in posts %}
    <li>
  
      {% if item.get_field('some_image') %}
        {% set item_image = item.get_field('some_image') %}
      {% else %}
        {% set item_image = 'http://placehold.it/300x300' %}
      {% endif %}

      <img src="{{ item_image | resize(300, 300) }}" alt="">
      
      {% if item.description %}
        <p>{{ item.description | excerpt(90) }}</p>
      {% endif %}
      
      <ul class="o-list--basic">
        {% for child in item.children() %}
          <li>
            <a href="{{ child.get_link }}">{{ child.title }}</a>
          </li>
        {% endfor %}
      </ul>
    </li>
  {% endfor %}
</ul>
       
{% endblock %}