Felix Wechsler

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.

𝐎𝐯𝐞𝐫𝐩𝐫𝐢𝐧𝐭𝐢𝐧𝐠 𝐰𝐢𝐭𝐡 𝐓𝐨𝐦𝐨𝐠𝐫𝐚𝐩𝐡𝐢𝐜 𝐕𝐨𝐥𝐮𝐦𝐞𝐭𝐫𝐢𝐜 𝐀𝐝𝐝𝐢𝐭𝐢𝐯𝐞 𝐌𝐚𝐧𝐮𝐟𝐚𝐜𝐭𝐮𝐫𝐢𝐧𝐠

Imagine 3D printing directly onto an object that already exists.

With Tomographic Volumetric Additive Manufacturing (TVAM), we can now print over existing components, opening up a world of possibilities for multi-component devices.

Configurations and access Services et ressources

In fact EPFL allows Thunderbird for Android.

So only Outlook, Apple Mail, Google Mail and Thunderbird are supported on Android.

See here: www.epfl.ch/campus/servi...

Lol the pays to link is clearly an accident

EPFL is fully migrating to Exchange Online without IMAP support?

Outlook or Google Mail are the only supported mail clients on Android.

Why are big universities not promoting open source and free alternatives anymore?

Also, what's the amount of money EPFL pays to MS...

@icepfl.bsky.social

@researchgate.bsky.social is practically unusable at EPFL's network because of "high traffic" (surprise at an academic institution)

Ending up in a loop of "verify" and login.

I need to test a potentially broken DDR 5 RAM stick. Not sure if it's my mainboard or the RAM.

Anyone EPFL (@icepfl.bsky.social, @epfl-ai-center.bsky.social , ...) can provide me access to theirs to test my RAM?

None of the IT helpdesks (STI, BC, Poseidon) could reasonably help me.

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.

Anyone else having huge troubles with @thorlabs.bsky.social orders recently?
We ordered mid of November. Some shipments arrived (but parts are missing even though indicated on the deliver note).
Also, some other items haven't arrived yet even though Thorlabs promised shipping beginning of December.

So is yo.mom :(

My team RGL is looking for new PhD students starting 2025. If you are excited about topics like inverse rendering, compilers for graphics, and physically based modeling then please join us at EPFL. Info about the lab & admission process: rgl.epfl.ch/pages/jobs (Deadline: Dec 15)

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.

We are excited to present a SIGGRAPH Asia paper exploring a new application of inverse rendering to Tomographic Volumetric Additive Manufacturing (TVAM), a new light-based 3D printing technology that can print objects in less than a minute.