Hey Will,
Thank you for your reply. However, when I tried to implement your changes, the images ended up stacked in only one column (not like the screenshot).
More pressing, the image sizes aren’t responsive, and seem to be following the thumbnail size variable (under media settings)
Is there any way to get images to resize responsively?
I found this tutorial on your website (forgive my previous mistake)
https://willrees.com/2013/02/jquery-masonry-and-native-wordpress-image-galleries/
I tried following the instructions through, but it turned up an error message when I I tried to include the js file in the functions.php.
Sorry to change the question on you, I’m just trying to make it work.