Every key, range and word a scene may use.

Every key, range and word a scene document may use: the output, visual tracks of clips (designs, material fills, colours, gradients, titles and shots), the camera, audio (voices, sounds, music) and subtitles. Call this first when making a video, and video_examples for whole scenes to start from. A scene can hold: drawn pictures with groups, flips and a multiply blend (a shadow, a vignette, a night grade); characters who talk (cast, timed lines with their own reading, ducked music, subtitles made from the lines, a mouth that moves on the words and eyes that blink); shots with people on paths, action beats (guard, strike, hit, fall, get-up) and gestures on cue (a wave, a point, a nod), animals and forms, and a camera that follows, orbits or cranes; music with a melody, a lead instrument and tempo changes; and sounds that move across the ears. Designs go inline in a scene; a path to a file is refused. A shot can stand in a world of ours, named by id and never by a path: copperside and low-quarter. In a scene it is a shot subject {"kind": "world", "id": "copperside", "at": [x, 0, z], "radius": metres}; copperside is Brasshollow's Copperside, the streets and buildings of its start zone around that point, and low-quarter a small generated quarter. A street draws its crowd by default, and the crowd is most of its price: set extra.crowd to false (or {"most": 0}) for the plain price, or {"most": 3} for a few people. A clip in a world costs 5 units more than a flat one and 0.2 a frame for a street; one that draws the crowd 25 more and 1.2 a frame. video_examples has copperside-street, 30 units. Costs no units.