M3-CRETE: Open-Source 3D Concrete Printing for Parametric Architecture

Published on March 04, 2026 | Translated from Spanish

Sunnyday Technologies presents M3-CRETE, an open-source concrete 3D printer with modular architecture designed for field use. This development seeks to close the gap between the digital model and physical construction, allowing parametric and BIM designs to be materialized directly on site. Oriented towards applications such as agricultural infrastructure, water control, and modular construction, it positions itself as a key tool for distributed manufacturing of architectural elements.

Modular concrete 3D printer printing a complex curved structure in an outdoor environment.

Modular architecture and open ecosystem for on-site construction 🏗️

The strength of M3-CRETE lies in its modular and disassemblable design, which allows scaling the printing capacity and facilitates transportation and repair in remote locations. It uses standard components and is compatible with common slicing software, eliminating technical barriers. Its entire development, from the bill of materials to the firmware, is open-source and available on GitHub, fostering customization and community feedback. This philosophy ensures compatibility, reduces maintenance costs, and empowers professionals and individuals to manufacture construction components.

Democratizing the materialization of parametric design 🔓

M3-CRETE represents a significant step towards the democratization of additive manufacturing in architecture. By prioritizing open-source code, modularity, and the use of common tools, it transforms complex designs into accessible physical objects. It is not just a machine, but a tangible bridge between the abstraction of the BIM model and constructive reality, opening new possibilities for customization, local resilience, and innovation in building.

How can M3-CRETE, being open-source, transform BIM and parametric design workflows for architectural projects with printed concrete?

(P.S.: BIM is like having a building in Excel, but with pretty windows.)