To understand the importance of storyboard in animation first you need to understand the importance of storyboard in general. A storyboard is a graphic representation of how your video will unfold, shot by shot. It is made up of a number of squares with illustrations or pictures representing each shot, with note about what’s going on in the scene and what’s being said in the script during that shot. A storyboard is a designer’s visual representation of what he or she envisions the final project to look like. It typically consists of a series of hand-drawn ‘cells’ the size of a half-sheet of paper or an index card, which represent the initial vision of what the future project will look like.
It helps the creator to get a rough overview of the work that will be produced as the end result. For an animated film all the characters and scenes are first prepared in frames known as storyboard and later brought to life by the animators. Without the storyboard it is next to impossible to create the characters in the first place. The spine of any smooth production is its organization, and storyboarding is a key vertebra. Regarding this important phase of pre-visualization and pre production, the animation creator does use this storyboard to picturize the frame and storyline in his own formative assessment.
Storyboards in a strict sense are traditionally done once a script has reached a certain plateau of finality — meaning it may not be locked outright, but only relatively minor alterations will be made in subsequent drafts. Gilliam here describes his story-boarding process sometimes affecting the script as new visual ideas come out, which is an interesting inversion of convention as I see it. He highlights the benefit of using storyboards as the skeletal basis of a scene’s structure, allowing out-of-sequence shooting to work just as well as shooting in-sequence with some creative variability for how to achieve each frame still retained by the shooting process itself.
Moreover it is to be understood that before bringing anything to the digital screen the animation creator prefers to bring it in the form of a rough draft and storyboarding helps with that. It visually tells the story in still and 2D form within the frames of panels. Creating a storyboard will help you plan your animation out shot by shot. You can make changes to your storyboard before you start animating, instead of changing your mind later. You will also be able to talk about your animation and show your storyboard to other people to get feedback on your ideas. It helps you flow your ideas on paper and flesh out all the raw data hence increasing the range of options for you.