The Brothers Grimm's "The Singing Bone" (Der singende Knochen) — KHM 28, twenty-eighth of a project to film all 240 Grimm tales, one by one, in canonical order. 100% AI-made on one home GPU (an RTX 3090), $0 marginal cost: nothing was sent to a cloud service and nothing was paid for.
A wild boar lays waste a kingdom, and the King promises his only daughter to whoever kills it. Two brothers go into the forest from opposite sides — the elder crafty and proud, the younger innocent and kind. A little man gives the younger a black spear because his heart is pure, and the boar runs onto it. On the way home the elder brother calls him into an inn, keeps him there until dark, and on a bridge over a brook strikes him dead from behind, buries him beneath the bridge, takes the boar to the King and marries the princess. Years afterwards a shepherd finds a snow-white little bone in the sand under the bridge and cuts a mouth-piece for his horn from it — and the bone sings.
The text is Margaret Hunt's 1884 translation (public domain), unabridged: every sentence verbatim and in order. Six voices, directed by state: the narrator, a ballad-teller, the murder told level; the careworn old King; the little man, small and bright; the elder brother, smooth — honey on the invitation, nothing at all behind the lie; the shepherd, astonished; and the bone, the younger brother's only words in the whole tale, sung years after his death on his murderer's own base voice, hollowed through a horn. The brothers are audibly kin.
The score is a dark orchestral ballad in the line of Loewe's Edward and Schubert's Erlking, and it is built so that the second telling of the murder is the climax: the bone's four-line song is the younger brother's own theme, a folk tune in D Dorian that is heard only in its first phrase while he lives — solo violin at "from a kind heart", the horn as he goes on fearlessly, the flute as he tells his brother everything — and is cut off mid-phrase by the blow on the bridge. The elder brother's motif is that phrase turned upside down: the same intervals, the opposite direction. It follows a step behind in canon on the dusk road, is gilded into a hollow B-flat march at the wedding, and sinks through the contrabasses at the drowning. The boar is a stamping figure in the basses and timpani; the King a modal chorale; the little man an F-sharp-major shimmer, the furthest key from home; the inn a G-major Ländler, the only bright music in the film, which curdles when the elder sees his brother coming. The first D major of the film is "nothing remains hidden from God". The bone sings all four phrases at last, flute and violin harmonics tracing each line beneath the words; the horn sings it again before the King; and the end is the song's last phrase broadened into a hymn in D major, horn and strings, released on a full chord. No fade-out. Sonatina Symphonic Orchestra through sfizz.
The diegetic layer is synthesized end to end: wind over laid-waste fields, the boar's grunts and the turf he tears, his charge through the ferns and the impact on the spear, the inn's mugs and dancing feet, two pairs of steps on the dusk road, the brook under the bridge, the blow and the body on the planks, a spade in sand, a flock of sheep and their bell, a knife paring the bone, the digging, and the sack going into the river.
The art follows the rule installed six films ago: the narration is cut into 42 beats, one per narrated event, and each beat has its own picture whose prompt names the face of that moment. 35 of the 42 shots are stills — a FLUX.1-dev plate at native resolution, judged by a local vision model against the beat's intent, conformed to locked character sheets with Qwen-Image-Edit-2511, judged again for identity, anatomy and head-count, upscaled and given a slow Ken Burns move. Only seven — the boar tearing the turf, the charge, the impact on the spear, the blow on the bridge, the first breath through the bone, the digging and the sack into the river — are continued into motion by Wan 2.2 (13 generations). The narration is the clock: each line's measured duration sets every cut and every bar.
Build time: 9h 15m, unattended.