So 'Featured image' option on WP is lacking. What I was expecting is when user selects multiple images it echos out multiple images on the page, instead you can only select one photo. I tried to find some plugin to do exactly that, but no luck. It seems easy to do and I wouldn't like any additional plugins.
Can anybody do that so when I type
<?php the_post_thumbnails('index-thumb'); ?>
<img src="..."... <img src="..."...
Any help is much appreciated! Thank you! ;)