giacomolaw

The Newspaper and Newsmag themes do not support the modal when using a CDN. This plugin works around that, and allows you to use the modal whilst using a subdomain, or different domain, to serve your images.
Also works if you use domain sharding.
You can contribute and view the code here: https://github.com/GiacomoLaw/cdn-modal-enabler/

CDN Modal Enabler

Enable the modal image when using a CDN in the tagDiv Newspaper theme - switch off global modal image in settings.

Jeroen Schmit

Make the <a href="https://wordpress.org/plugins/timber-library/" rel="ugc">Timber</a> plugin work with Jetpack’s Photon. Once installed, all TimberImages use Photon as a CDN and for image manipulation (eg. resize).
<a href="http://jetpack.me/support/photon/" rel="nofollow ugc">Photon</a> is an image acceleration and modification service for Jetpack-connected WordPress sites. Converted images are cached automatically and served from the WordPress.com CDN. Photon is part of the Jetpack plugin and completely free.
<h3>What does it do?</h3>
Timber with Jetpack Photon extends the current TimberImage class to use Photon to serve and manipulate your images:
<ul>
<li><code>{{post.thumbnail.src}}</code> returns a Photon URL</li>
<li><code>{{post.thumbnail.src|resize(100)}}</code> returns a Photon URL</li>
<li><code>{{post.thumbnail.src|resize(100,200)}}</code> returns a Photon URL</li>
</ul>
A Photon URL looks like this:
//i0.wp.com/www.slimndap.com/wp-content/uploads/2014/05/slimndap.png
Requires the <a href="http://jarednova.github.io/timber/" rel="nofollow ugc">Timber plugin</a> by <a href="https://profiles.wordpress.org/jarednova/" rel="nofollow ugc">Jared Nova</a> and the Jetpack plugin with Photon activated.
Contributors welcome
<ul>
<li>Submit a <a href="https://github.com/slimndap/TimberPhoton" rel="nofollow ugc">pull request on Github</a></li>
</ul>
Author
<ul>
<li><a href="http://slimndap.com" rel="nofollow ugc">Jeroen Schmit, Slim & Dapper</a></li>
</ul>

Timber with Jetpack Photon

Plug-in to use JetPack's free Photon image manipulation and CDN with Timber.

CDN Modal Enabler vs Timber with Jetpack Photon