A walk through the Menger sponge (from y = 0 to y = -8). The field of view is equirectangular. To see the video clearly, it is rendered in 25 FPS. Enjoy! 
<p>Rendered with mandelbulber v. 2.19 and VirtualDub2.
</p>
<ol><li>8K</li>
<li>Mengersponge</li>
<li>Equirectangular</li></ol>
<a href="//commons.wikimedia.org/wiki/User:PantheraLeo1359531" title="User:PantheraLeo1359531">PantheraLeo1359531</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>