This image started when I was playing around with the Multi-Replicate command. Multi-replication of a torus produced the curving 'horn' shapes visible in this image. I then progressively added bits and pieces, Booleaned a bit here and there, did some more multi-replications, and finally emerged with this image.
The seated figure is Poser, the helmet is a rather crude attempt at a helmet made in Ray Dream Studio. I'd actually trashed it in disgust, then realised that it was just what I needed for this project, so I revived it.
The steam clouds are a modified version of one of the volumetric presets that ships with Bryce.