I create all the 3D images on my site personally, using "Carrara Studio" by Eovia. (
http://www.eovia.com ) I also use Photoshop, Illustrator, and other software, to add text, fine-tune colors, etc..
Good luck on your P-47. The Top Flite kits are good to practice scale techniques on without spending a fortune. (Several friends and I built a TopFlite Cessna 182 last year, and now one of my local friends is doing the Bonanza.
Happy flying!