Carlos Cabrera is an illustrator based in Argentina. In addition to designing websites, he does a fair bit of “fantasy” and gaming illustration (portfolio). He has put together three massive (300+ Mb AVI) video tutorials and a smaller PDF file that show his illustration process.

The video tutorials include Alien Painting with Photoshop, Vampire Painting with Photoshop, and Metal Painting with Photoshop - which are all part of his Watch and Learn series. There is also a 10 Mb PDF that is from an article of his at 2D Artist magazine.

If you want to learn a bit about drawing fantastical creatures, these tutorials are worth checking out.