You can also make a wall using lots of individual pieces (this is good if you want to blow it apart it won't do that on a single cube)

here is an address to a forum called Brycetech it has lots of cool bryce effects you can learn 

http://brycetech.daz3d.com/

You can also do lots of other cool effects like blowing space ships up and stuff.

Hope this has helped a bit.

Karl