Comment on 400 square meters of mandelbulb by MANDELWERK

I saw one of your animations on Youtube. Brilliant! I am trying to learn Mandelbulb and/or Boxplorer and/or Mandelbulber. (Heartfelt plea coming...) They are driving me mad - do you know of any tutorials I could look at?

I have looked but not found.

Thanking you in advance for any help yoiu could give!

Ian