Currently if you have a theme that use
add_image_size for let say 6 different image size you will have 6 different thumbnail created that will maybe never be used.
With the current version of WordPress what is the best way to make a theme that use 6 or more image size.
What about the
wp_get_attachment_image function, if you use an array instead of a thumbnail size, does the image thumbnail get generated on the fly, how does this work?
I would like to use more than 8 different thumbnail sizes without having a lot of un-needed thumbnail in my ftp
Any advice is welcome