The vial is filled with a bio-resin (Gel-Ma, gelatine based hydrogels). We polyermize then everything except the channel. The channel we wash out, and then we can pump the blue color through.

This work was in collaboration with my lab LAPD at EPFL and @wjakob.bsky.social, @bathal.bsky.social from EPFL and NVIDIA

Our microprojector on the LED.

In this experiment we print over balls at arbitrary locations within minutes.

Link to paper: arxiv.org/abs/2507.13842
Link to Dr.TVAM: github.com/rgl-epfl/drt...
Link to configuration files: github.com/EPFL-LAPD/Ov...

Some of our experiments are:
- Printing micro-fluidic channels around existing inlets in a square vial.
- Fabricating a custom lens directly onto an LED, turning it into a micro-projector
- Detecting spheres at arbitrary locations and printing over them within minutes.

Our solution, based on the physics-based renderer Mitsuba, allows Dr.TVAM to predict and compensate for these optical effects, ensuring precision.

In our recent work, we showcase five overprinting scenarios using our open-source software, Dr.TVAM. The main challenge with printing around an object is that it distorts the light used to cure the resin.

Lol the pays to link is clearly an accident

Also now I noticed over the University order we can't access any information or status of our order.
And, Thorlabs also doesn't send you emails to keep you updated.
No reply from customer support either so far.

So is yo.mom :(

There is this nice work "A review of materials used in tomographic volumetric additive manufacturing" from Jorge Madrid-Wolff et al.

But do not hesitate to reach out to me if you are looking for something specifically to print!

There is published work around printing ceramics, optical elements, organoids (bio printing). TVAM is incredible flexible.

As long as the material is relatively transparent, many things can be done. Ceramics for example need certain postprocessing steps.

This was a joint effort between EPFL's RGL and LAPD labs (@felixwechsler.bsky.social).
We release an open-source software, Dr.TVAM, which can be easily installed via pip. Please see the [documentation](drtvam.readthedocs.io) and our [paper](rgl.epfl.ch/publications...) for more details.

We also present an improved discretization scheme that keeps information about the printed object’s surface while optimizing, which alleviates pixelated artifacts coming from naively discretizing the target object on a regular voxel grid.

We demonstrate the versatility of our framework in novel printing configurations such as printing in a square container, which has a higher optical quality than glass-blown cylindrical vials.

In contrast, our framework is based on a differentiable renderer, therefore we can apply volume rendering techniques to accurately model scattering by participating media. We can produce higher-quality prints than previous methods in scattering media.

One key challenge in TVAM is computing projection patterns to print a particular object. Existing methods rely on a simplified light transport model to simulate absorption of energy inside the medium. When the resin contains scattering particles, this requires using approximations.