[HN Gopher] Dr. TVAM - Inverse Rendering for Tomographic Volumet...
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       Dr. TVAM - Inverse Rendering for Tomographic Volumetric Additive
       Manufacturing
        
       We published this work at SIGGRAPH ASIA 2024.  Based on Mitsuba 3
       and Dr. JIT we provide our software Dr. TVAM to optimize patterns
       for TVAM. TVAM allows to print centi-meter scale objects within
       seconds.
        
       Author : roflmaostc
       Score  : 32 points
       Date   : 2025-01-17 16:53 UTC (6 hours ago)
        
 (HTM) web link (github.com)
 (TXT) w3m dump (github.com)
        
       | ajb wrote:
       | Amazing stuff. I wonder what hardware you need to try it out.
        
         | roflmaostc wrote:
         | You need a powerful light source such as a LED laser or a high
         | power LED. Also the setup is not super trivial. To set up for
         | non optics people.
        
       | blackeyeblitzar wrote:
       | There's not much detail on this GitHub page. Is there an
       | explanation for a regular person that isn't deeply familiar with
       | additive manufacturing? Is this software to be used to control a
       | 3D printer? Or something else?
        
         | timerol wrote:
         | Clicking the first image on the Github page takes you to a
         | paper with a very good abstract
         | https://rgl.epfl.ch/publications/Nicolet2024Inverse
         | 
         | > Tomographic Volumetric Additive Manufacturing (TVAM) is an
         | emerging 3D printing technology that can create complex objects
         | in under a minute. The key idea is to project intense light
         | patterns onto a rotating vial of photo-sensitive resin, causing
         | polymerization where the cumulative dose of these patterns
         | reaches the polymerization threshold. We formulate the pattern
         | calculation as an inverse light transport problem and solve it
         | via physically based differentiable rendering. In doing so, we
         | address long-standing limitations of prior work by accurately
         | modeling and correcting for scattering in composite resins,
         | printing in non-symmetric vials, and supporting unusual
         | printing geometries. We also introduce an improved
         | discretization scheme that exploits the ray tracing operation
         | to mitigate resolution-related artifacts in prints. We
         | demonstrate the benefits of our method in real-world
         | experiments, where our computed patterns produce prints with an
         | improved fidelity.
        
           | xyzzy123 wrote:
           | So, it's software for driving super-fast resin printers that
           | work similar to beam radiation therapy (but with lasers and
           | resin). Very cool.
        
             | TeMPOraL wrote:
             | Another big step towards a Star Trek replicator.
        
             | roflmaostc wrote:
             | Yes exactly! In the beginning people used also the Radon
             | transform. But it cannot account for effects such as
             | scattering or refraction properly.
        
       | feb wrote:
       | This sounds like the technique shown by 3D Printing Nerd on
       | YouTube: https://m.youtube.com/watch?v=oHPrnYMdLow There they
       | called it computed axial lithography.
        
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       (page generated 2025-01-17 23:00 UTC)