I had a normal scan on wed and the Dr. really kindly switched to 4D and took one piccy for us. The original is slightly clearer but I was amazed at how much you could see of bubs ickle face...she seems to have really pouty lips!
The actual scan was just part of my 36 wk check up (growth etc.). They didn't charge us though for the 4D piccy, he just snuck it in as the machine they use does 4D and normal scans...so sweet of him I had a proper 4D scan (with a video recording etc) at 33 wks which was private and we got loads of piccies from that.
Enjoy it, I had a proper 4D scan at 33 weeks and it was the most amazing thing! The piccies were even clearer than the one above as the baby was smaller so the piccies were clearer. You'll have to post your up too