I have a Wordpress site with more than 1000 product images. I recently added 2 custom image sizes, product-medium and product-large. So, when I upload a new product featured image, it is hard cropping the medium and large sizes perfectly.
However, the already uploaded images don't crop themselves to these 2 sizes. Any suggestions would be helpful.
I have tried using the regenerating thumbnails plugin, but it doesn't generate the 2 custom image sizes.
add_image_size( 'product-medium', 640, 480, true );
add_image_size( 'product-large', 1024, 576, true );
There is no error message. All the newly uploaded images show the 2 custom resolutions but the older ones don't.