[tinus_hn]

Cool, unfortunately as this isn’t a blog but more a collection of articles there’s no RSS feed to keep track

[Sandvich]

I found it at https://www.iquilezles.org/www/articles/rss.php

[Sandvich]

Looks like he stopped updating it in 2013, actually. Shame.

[hope-striker]

As mentioned below, he has a blog at https://www.iquilezles.org/blog/ and it's WordPress, so there's a feed at https://www.iquilezles.org/blog/wp-rss2.php .