The video below is what I made for my first term project as a MA Digital Effects student at Bournemouth University. We had to take a scene shot in the daylight above water and make it look like an underwater scene. We also had to add an artefact with a light source that would interact with the scene. This is probably not the best I could have done, but this is what I managed in 10 weeks.

 Watch in Full HD.

Wishing you a Merry Christmas and a Happy New Year! :)