I did a version of this a while back, but the model I had was right at the limit of what Bryce 6 and my old PC could handle. With Bryce 7 and a fast[er] machine, I've restarted the project from scratch.
Here's the progress so far:
A dual dorsal/ventral view:

Latest update:

The old project has a folder in my dA gallery if you're interested.
Here's the progress so far:
A dual dorsal/ventral view:

Latest update:

The old project has a folder in my dA gallery if you're interested.