Created using Ultra Fractal.
For details of how this was created see:[link]
The minibrot is at approx. -1.76 on the real axis and is viewed from 30 degrees above and 50 degrees around (camera target point set slightly nearer the main cardioid).
Bailout was x^2+y^2+z^2+w^2>4 and the maximum iteration count allowed was 60, though solid was based on iteration density so rarely if ever would 60 iterations actually be used.
Rendered to disk in Ultra Fractal at a resolution of 3840*2880, time 1hour 51mins on a (heat impaired) 3GHz P4HT effectively in single-threaded mode due to the render being performed to a screen buffer in the global section of a UF formula.