Start a hosting plan from $3.92/mo and get a free year on Tuts+ (normally $180)
This is a really nice method to quickly cut an alpha hole into your CG scene so you can then easily composite any image into the alpha area. This technique can be used in many different situations, and I have personally used it in TV commercials and many of my personal projects for fun. Hopefully you will find this trick useful too!
Final Effect Preview
Note: click the 'Monitor' icon to view tutorial in full-screen HD.