1. The picture
the picture with the artists shown above
what changed, times the gain
Every combination of artists (64 per picture) was computed exactly by the engine when the receipt was made; switching them here reads those results. Nothing on this page is estimated or drawn by hand.
2. Who gets paid
use: what the receipt says was copied leave-one-out: what changed when that artist alone was removed Shapley: average change over every order of removal
3. A drawing as a player
A viewer's drawing starts the generator part-way (strength k = 14 of 19 steps, where the drawn shape first shows; at lower strength every drawing gave nearly the same paper-toned picture). You can take out its paper (a blank sheet in the same colour) and its lines (the drawing minus that sheet) separately; every one of the 256 combinations was run. Pay treats the drawing as one player: splitting a party into more players moves everyone else's pay, so the split is shown as description only.
the drawing
the picture with the players shown above
Draw your own
draw here (paper and ink are the corpus's own colours)
the engine's picture appears here
Turning a drawing into a picture runs the generator on a local server, so these two buttons are off on this site.
4. The arithmetic
Shapley value = sum over every set S of the other artists of weight(|S|) × [value with S plus this artist − value with S alone]. weight(s) = s!(5 − s)!/6!. Value of a set = minus the distance from its picture to the picture with every artist.
5. Checks
With this picture
From the frozen tests behind the instrument
6. Receipt
Replaying needs the generator itself, so on this site the button is off: download the receipt and run the check locally. The spot check regenerates 4 of the 64 combinations and checks that their pictures and values match the receipt exactly. It can miss a forged value in a combination it did not pick; the complete check regenerates all 64: python3 receipt/verify.py <receipt> --replay all.
7. What this is and is not
- 32 by 32 pixels. The generator is an exact patch model (Kamb and Ganguli 2025), so its pictures are painterly mosaics, not depictions.
- Training views of each sheet are 64-pixel crops centred where the artist drew (a declared choice that favours the marks).
- The museum pool is present in every picture and is not paid; it holds none of these six artists' works.
- Sampling starts just below pure noise (t = 0.95): at pure noise every source got a blind, head-count vote that paid a nonsense control 3 to 7%.
- Use, leave-one-out and Shapley pay differently; which rule pays is a policy choice, and the receipt states it.
- A drawing's paper colour moves the picture far more than its lines do by pixels; that is why the drawing is split into two players. Payouts for your own sketch are not computed live (256 runs, about ten minutes).