Splatted ink on tissue, rendered with alpha channel. Use it with composite modes or to mask or reveal objects. This method is used in music video Crazy by Gnars Barkley and end credits in Sherlock Holmes by Guy Ritchie.
Ink splatter
Looped Video: No, Resolution: 720x576, Video Encoding: QT animation plus alpha, File Size: 50mb, Total Clip(s) Length: 0:06, Pace: Time Lapse