Rendered in Mandelbulb 3d using the _FoldingTetra3d and SierpHilbert formulas, for those experienced with the software. The images were then compiled in Blender 3d, with the last half being a reverse playback of the same images. Originally meant to be run at 24 FPS so it might be a little too fast for some viewers.
The software can be downloaded for free at: https://www.mandelbulb.com/2014/mandelbulb-3d-mb3d-fractal-rendering-software/
For those interested in seeing my still images and other works, here's my deviantart page.
Mostly mandalas, abstracts, and other such works: https://www.deviantart.com/dr-pen