I put together this little movie as (hopefully) the first in a series. http://www.youtube.com/watch?v=xjMjWtntm9k" My target audience is a second semester class of physics students that have already had a lectures in basic wave optics. When I give this URL to my students, it's with the expectation that they will be able to play it multiple times, and to pause it to see what's happening. This describes thin film interference by showing what the waves are doing, how the refractive index matters, when the inverted waves happen, etc. It took over a year to put this together in my spare time, using POV-Ray and the voice of one of my students. Feedback would be appreciated ... add feedback and comments to the YouTube page ... I might not see them right away if you reply here, but anywhere is fine. (Any press is good press, as they say. :) Note that I'm already aware of a few editing issues I had with the piece. I'm interested in whether or not (and how much) this would be useful. While criticism is fine, please be kind. Remember, I spent a long time on this. Thanks and enjoy!