'Post-thumbnails' feature does not seem to register

Question

We are trying to change the crop style of the thumbnails attached to the posts on our website. This is the code we have used to declare a new image-size:

<?php

/** --- Thumbnails configuration **/

function add_custom_sizes() {
    add_theme_support('post-thumbnails', array('post', 'page', 'custom-post-type-name'));

    // Featured size 
    add_image_size( 'featured-big', 400, 400, true ); // width, height, crop
}

add_action('after_setup_theme','add_custom_sizes');

?>

We then call this image-size while printing out one of our thumbnails:

<?php 
    the_post_thumbnail( 'featured-big' );
?>

However the thumbnail doesn't seem to be cropped correctly. The parameter true in the add_theme_support function is supposed to 'Hard Crop' the image, however the image is 'Soft' cropped, incorrectly.

Any clues?

Answer 1

Image sizes and cropping settings do not apply retroactively: images that were present on your site before you made this change are not affected.

Your new settings will only apply to images you upload afterwards, because image are cropped at the time of uploading.

You can either try to upload a new image, or you can trigger the re-cropping of previously uploaded images to apply your new settings with the very handy Regenerate thumbnails plugin.