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✦ Case Study · Millerntor Gallery #13 · Hamburg

Hundreds drew it.
With us they
can prove it.

How 3member.me turned Millerntor Gallery visitors into verified co-creators of a collective artwork — with individual proof of contribution and shared revenue when both works sold.

Bring it to your festival ↗
Collective wall artwork at Millerntor Gallery
3member.me · Millerntor Gallery #13 · Hamburg 2025
✦ The Activation

A participatory art installation.
Where every contribution counts.

✏️
Draw on the wall
Visitors picked up a marker and added their contribution to a large blank canvas — no rules, no filters. Just expression.
📸
Upload your part
Each contributor photographed their drawing and uploaded it via the 3member.me app. One upload per person — verified as original.
🔒
Proof of authorship
Every upload is timestamped, attributed, and protected by duplicate-content filtering. Your contribution is yours — provably.
Empty wall at the start of the event
Before
An empty canvas.
Wall filled with collective artwork
After
A collective artwork
by hundreds.
✦ The Key Innovation

Your upload is
your proof.

1
You draw on the wall
Physical mark, real moment — your creative act in a shared space.
2
You photograph and upload it
Your photo is timestamped and linked to your identity. Nobody else can claim it.
3
You can prove: "That was me."
Forever verifiable. "I was here. I created that." — with receipts.
🛡️
Duplicate-content filter: only one original per contribution. No copies. No false claims.
Visitor uploading their contribution via the 3member.me app
Digital collective artwork made from all uploads
✦ The Second Artwork

From uploads,
a second digital artwork
is born.

Every individual upload is assembled into a separate, standalone digital artwork. The physical wall and the digital mosaic are two distinct works — each with its own value, each co-created by the same community.

Two sellable artworks from one activation
Every contributor is part of both
Each upload visible as individual element
Digital artwork exists independently of the physical work
✦ The Outcome

Both artworks sold.
Every contributor earned.

The physical canvas and the digital artwork were both sold. Revenue was distributed automatically to all contributors. No middlemen. No manual payouts.

Physical
The collective canvas
Hundreds of visitors created it together — sold as a unique physical piece.
Digital
The digital mosaic
All uploads assembled into one digital artwork — every contributor traceable.
"I was here. I created that. And I got paid for it."
✦ For Festival Organizers

You get a program.
We bring a story.

🎨
A participatory art installation, fully set up
Canvas, app, duplicate filter, attribution — all ready. Your visitors just draw.
🖼️
Two sellable artworks as festival assets
Physical canvas + digital mosaic — both yours to sell, exhibit, or donate.
📊
First-party data from your most engaged visitors
Every contributor registers. You own that data for re-engagement and sponsoring.
📣
A PR story that writes itself
"Hundreds of visitors created a collective artwork that sold — and everyone got paid." That's a headline.
Let's talk about your festival ↗
Visitors in front of the collective canvas at Millerntor Gallery
✦ Ready to activate your audience?

Let's build your
collective moment.

30-minute call. We'll show you how the activation works, what both artworks look like, and what your visitors walk away with.

Book a 30-min call ↗
3member.me · ch@dci-institute.com