red hat with bubbles
This should be interesting to anyone who has used mandelbulb3d. Start with a parameter sset that will give you transparent blocks with bubbles and such internal structure. find a nice image and then move into one of the objects so that you are just on the edge showing a slice through the object. Even if it is featureless go and change the camera to "pano[ramaa]."
You might get an image like this. I seems to help to staay close to the edge. Once you find an image you can move around tp some extent, although you cannot zoom in or out, it will only take you in one or more jumps to another image. I'm not at all sure what you are seeing here but that is roughly how this is made.