Wow, this is really something else ... I haven't experimented working with Mandelbulb so far, but this is very inspiring! I'm sorry I cannot analyze and comment on your work with much depth due to my lack of knowledge of the program, but it just looks like you've done a fantastic job with every single aspect presented in this render - from the very forms to the coloring ... and the blur!
Fantastic Render, Perfect title, Great Lighting and Coloring!! You Just Did an Awesome Job on this one Brent!
I saw this the other day and failed to comment at the time, but when looking for parameters to work on I re-discovered it and felt bad that I didn't praise you the first time I saw this INCREDIBLE RENDER!