Paolo Cignoni
aloopingicon.bsky.social
Paolo Cignoni
@aloopingicon.bsky.social
Research Director at CNR, head of Visual Computing Lab
Messing with small triangles for ages.
Guilty of providing the community with many buggy, but hopefully useful, tools
The position is fully funded for three years and will begin in November 2025. The main workplace will be in Pisa in my Lab.
For any questions, application support, or further details, feel free to contact me at: paolo.cignoni@cnr.it
July 7, 2025 at 2:50 PM
Great to see old (25y old!) tricks surfacing again!
doi.org/10.1111/1467...
Palette encoding of normals was a thing before shaders :) We run this stuff on a NVIDIA Riva 128 🤣
Real Time, Accurate, Multi‐Featured Rendering of Bump Mapped Surfaces
We present a new technique to render in real time objects which have part of their high frequency geometric detail encoded in bump maps. It is based on the quantization of normal-maps, and achieves e....
doi.org
May 27, 2025 at 10:34 AM
More info on the project (code etc.)
vcg.isti.cnr.it/publication/...

Optimizing Free-Form Grid Shells with Reclaimed Elements under Inventory Constraints
Andrea Favilli, Francesco Laccone, Paolo Cignoni, Luigi Malomo, Daniela Giorgi
Computer Graphics Forum (Eurographics 2025)
Optimizing Free-Form Grid Shells with Reclaimed Elements under Inventory Constraints | Visual Computing Lab
We propose a method for designing 3D architectural free-form surfaces, represented as grid shells with beams sourced from inventories of reclaimed elements from dismantled buildings. In inventory-cons...
vcg.isti.cnr.it
May 14, 2025 at 12:48 PM
We propose a computational framework for designing #freeform grid shells using reclaimed structural elements, explicitly addressing inventory constraints such as element lengths and availability without compromising design flexibility or structural integrity.
onlinelibrary.wiley.com/doi/10.1111/...
Optimizing Free‐Form Grid Shells with Reclaimed Elements under Inventory Constraints
We propose a method for designing 3D architectural free-form surfaces, represented as grid shells with beams sourced from inventories of reclaimed elements from dismantled buildings. In inventory-con...
onlinelibrary.wiley.com
May 14, 2025 at 12:48 PM
Another viable solution for publishing "heavy" 3D models efficiently and simply on the web is the #3DHop framework that relies on the open source nexus multiresolution streaming 3D engine 3dhop.net
It handles hi-res 3D models (100Mtris) also on low-bandwidth, on plain web server.
3DHOP - Home
3dhop.net
March 7, 2025 at 1:24 PM
Final note, we also presented one incoming innovative tool for the 3D decomposition and analysis of the branches of corals. A cute mesh-processing problem mixing skeletonization, pruning, and clipping that will be integrated in MeshLab...
December 10, 2024 at 7:18 PM
The effort for a research lab to maintain, improve and distribute an open source tool over the years is not small. But the sheer joy that you get when you see #TagLab widely used on the field in many reef monitoring projects is priceless.
December 10, 2024 at 7:18 PM
Indeed! Tetrahedral visibility sorting was not trivial (sorting centers of tetrahedra works only if the mesh is a Delaunay one and you sort the centers of circumsphere of the tetrahedra)
November 22, 2024 at 2:57 PM
Definitely not a shame! It was stuff published on minor venues more than 25 years ago!

Curiosity, how the sorting for compositing is handled efficiently now? It was a real pain and was necessary for materials that are also emissive (needed for approximating scattering)...
November 22, 2024 at 2:04 PM
I can't help but applaud something that reminds me of my PhD days! 😀
>25y ago I worked on the same ideas, definitely on different graphics hardware 😅

iris.cnr.it/bitstream/20...
iris.cnr.it
November 22, 2024 at 11:36 AM