glowrocks

<p>For posts and pages with no featured image, and no images associated with the entry, a random image is selected from the media library and set as the featured image.</p>
<p>The plugin currently does not test for images associated with the entry.</p>
<p>Instead, install and run the Easy Add Thumbnail plugin (https://wordpress.org/plugins/easy-add-thumbnail/).</p>
<p>That plugin will set the featured image on all entries that both have no featured image AND have an image associated with the post.</p>
<p>What is left is entries without featured images and without any images.</p>
<p>This plugin provides a random image from the sites media library so that index pages look more interesting (and possibly confusing/humorous depending on which image is randomly selected.)</p>
<p>There is a notice at the bottom of each post the plugin has updated noting the random image. In a future release, this note will be optional via the standard user interface, but for now one has to edit the plugin and remove the last “filter” line. This notice is not displayed if the plugin is removed.</p>


Random Auto Featured Image

For posts/pages with no featured image, & no images associated with the entry, a random image is selected from media library & set as featured image.

goigi

<p>The Play Random Image plugin allows administrators to easily create random image gallery for their users to participate in. Random Galleries are created via the WordPress administrative interface. After creation, users can access it via the permalink for the play random image.</p>
<h4>Docs & Support</h4>
<p>You can find <a href="https://github.com/dasbairagya/play-random-image" rel="nofollow ugc">docs</a> and more detailed information about Play Random Image on <a href="https://www.goigi.com/" rel="nofollow ugc">goigi.com</a>. If you were unable to find the answer to your question on the FAQ or in any of the documentation, you should check the <a href="https://wordpress.org/support/plugin/play-random-image/" rel="ugc">support forum</a> on WordPress.org. If you can’t locate any topics that pertain to your particular issue, post a new topic for it.</p>
<h3>Donations</h3>


Play Random Image Plugin

It's really good to see the progress of igi in plugin development too.
The plugin is very simple and nice with good documentation and shortcode feature.

Nice Simple Plugin

Play Random Image is a responsive random image generator plugin for WordPress with which you could able to show your users some random information by  …

Random Auto Featured Image vs Play Random Image Plugin