The lack of a single source for video design, management and playback has thankfully changed, and now video designers have some very powerful pre-visualization/media server hybrid packages. Two of these, the d3 (d3 Technologies) and Ai (Avolites Media), offer the same levels of design and pre-visualization control to video directors that wysiwyg, ESP Vision and LightConverse offer to lighting designers. These proprietary hardware/software servers offer the video designer the ability to lay out all projection details needed, including angles, throw distances and lens options, while also storing the content and the timeline or cuelist for playback as well as allowing for via external control (like DMX or Art-Net).
—From “Video Digerati” by Vickie Claiborne, PLSN, Nov. 2014, page 100