A research group associated with UC Berkeley has made OpenCAL available for people who want to explore computed axial lithography. Instead of laying down melted filament or curing resin one thin layer at a time, the machine rotates a small vial of photopolymer resin while projecting a calculated sequence of light patterns through it. A complete three-dimensional object solidifies inside the liquid volume. A reported demonstration prints a miniature Thinker in roughly 90 seconds.
The newly public design is aimed at researchers and advanced makers rather than people looking for a plug-and-play Bambu replacement. The published reference hardware is estimated around $1,600 in components. OpenCAL's firmware repository explains a Raspberry Pi 5 controller, a projector, a rotating stepper-driven vial, calibration routines, an LCD interface and optional camera capture. Hardware alignment and resin handling are a substantial part of the project.
The promise is fascinating: because there are no conventional printed layers, a suitably shaped object may avoid familiar stair-stepping and some layer-adhesion issues. But it is not magic. Resin optical properties, object geometry, exposure calibration, post-curing, and handling still govern what can be made. It is not a drop-in method for printing large, load-bearing PETG or TPU parts.
One detail matters for an entrepreneur: the project's published software license is free for educational, research and nonprofit uses, but commercial use requires a separate agreement with the University of California. The public repository describes the system as research-oriented. Do not assume that public code and a bill of materials confer unrestricted commercial manufacturing rights.
What to do: watch the technique, open the actual firmware repository, inspect the parts and license, and compare its 90-second volumetric approach with the H2D's layer-based workflow. It is a great source of product ideas even if the right immediate decision is not to build one.