[Themify Ultra / Jetpack's Photon module

plugin.php

<?php
/**
 * The theme appears to be using its own function, `themify_get_image()`, to build image URLs used to display images above posts.
 * It can grab image details (like dimensions) from custom fields in each post,
 * and then builds a custom HTML output based on parameters you can add to the function.
 * 
 * Photon won't be able to support that, so they'll need to make these images don't get processed by Photon at all.
 * 
 * Add the following to a functionality plugin to force Photon to ignore such images
 */

function jetpackme_themify_stop_photon() {
	$photon_removed = remove_filter( 'image_downsize', array( Jetpack_Photon::instance(), 'filter_image_downsize' ) );
}
add_action( 'themify_before_post_image', 'jetpackme_themify_stop_photon' );

function jetpackme_themify_reenable_photon() {
	if ( $photon_removed ) {
		add_filter( 'image_downsize', array( Jetpack_Photon::instance(), 'filter_image_downsize' ), 10, 3 );
	}
}
add_action( 'themify_after_post_image', 'jetpackme_themify_reenable_photon' );