Multiple images layered. All from my Perspective VI entry (or a very similar shot) and then copied, flipped or rotated and layered in Photoshop then played about with the layer settings, multiple, darken etc and shifted about into a longer landscape format. I then cropped any interesting parts of the image. Then played with contrast etc and heavy grain in the Nik Software Silver Efex Pro plug-in which is great although similar grain etc could be got just with PS i'm sure. I added a slight split tone as well. Glad you like them!
Wow, I've really been enjoying these, sad to hear you're changing tack, but looking forward to see what's next! Very interested to know what methods you use for processing or is that a secret?