CALASTRA.
Scroll is the sun.
A concept page for a fictional house on the cliff at Cap Verroux. The scroll is the day: it carries the sun from 06:00 to 22:00 over 43.1907° N on 21 June, and the page relights around it — four films of the same frame cross-fade by the hour while the light between them is computed. Every number is derived from one solar model: the length of a shadow, how far the sun reaches into the arcade, the colour of the beam on the Planckian locus, its bearing against the pool, and the photocell that brings the lamps up at dusk.
The piece, section by section
A house on a cliff where scrolling moves the sun, and every figure on the page is recomputed from where it stands.
Scroll is the sun.
Four films of the same frame — morning, high sun, golden, dusk — cross-faded by the hour, with the exposure and the beam colour between them computed from the solar altitude.
The road ends before the house.
At 07:42 the sun is 16.3° up and a one-metre stick throws 3.43 m; the gnomon and its shadow are drawn to scale beside the film.
Thick walls, one long view.
The arcade faces 208°, its openings are 3.2 m high and the colonnade is 4.1 m deep, so the sun cannot cross the sill until 14:12 — which is why the corridors stay cool.
No two the same.
The beam at 5,600 K, plotted on the Planckian locus computed with the Kim et al. cubic, with the chromaticity and the air mass beside it.
Thirty-eight metres on the edge.
The pool runs along 118°; late in the day the sun swings 161° off that axis and lays a glitter path down the length of the water.
The lamps come on before the sun goes.
A photocell trips at 2.1° and brings the lamps up over six degrees of altitude; the response curve is drawn and the current output read off it.
Nothing here is rounded up.
The day’s altitude curve drawn from the model — sunrise 06:17, solar noon 13:39 at 70.3°, sunset 21:02 — with the five chapters marked on it and the full specification below.
Made honestly
CALASTRA is fictional and nothing is for sale. The films were generated in Google Flow (Veo 3.1 Quality for the motion, Nano Banana Pro for the four times of day) on a locked camera; every movement in them is theirs. The sun model, the light, the colour, the diagrams, the typography, the scroll engine and the music are computed in code. Position from the NOAA solar equations, air mass from Kasten & Young (1989), colour from the Planckian locus (Kim et al., 1999).
More from the collection
Keep exploring.
RS-01
A fictional brick-built race car kit: your scroll lets the finished car go into its 1,622 pieces and builds it back, brick by brick, under a camera viewfinder.
AJ1
An unofficial redesign of the Air Jordan 1 page: the scroll takes the shoe apart panel by panel, sews it back together and lines up its colourways.
M3 E30
An unofficial fan concept for the original M3, where nothing on the page is a video: every frame is rendered live in the browser.
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