Juan Raúl Padrón Griffe

About me
I am a postdoctoral researcher in Junqiu Zhu's group at Shandong University. My research focuses on photorealistic rendering, including appearance modeling for complex multi-scale materials (human skin, hair, fur, scales, feathers, cosmetics, clothes, and granular materials), light transport simulation algorithms and data-driven representations. I am also interested in inverse rendering, differentiable rendering and 3D reconstruction.

I completed my PhD dissertation, Modeling and Rendering of Multiscale Materials, at the Graphics and Imaging Lab, Universidad de Zaragoza. I was a Marie Sklodowska-Curie Fellow of the EU Project PRIME, advised by Adolfo Muñoz and Adrian Jarabo. I hold an M.Sc. in Informatics from the Technical University of Munich with a major in Graphics and Vision, and a B.Sc. in Computer Science from the Universidad Central de Venezuela with a major in Computer Graphics.

Projects

Snake Skin Rendering (CEIG 2023)

2023, Jul 06    

This project started as a bachelor thesis of a talented student (Diego Bielsa) that I supervised together with Adolfo Muñoz at the Graphics and Imaging Lab and later it was presented at the Spanish Computer Graphics Conference (CEIG 2023, Palma de Mallorca) under the title “A Biologically-Inspired Appearance Model for Snake Skin”. The implementation consists of a multi-layered material implemented inside the physically-based renderer Mitsuba 0.6 using the Position-Free Monte Carlo formulation. The top layer is a thin layer responsible for the specular iridescent reflection using a practical iridescent microfacet model, while the bottom layer is a diffuse highly-absorbing layer designed to reproduce the dark diffuse appearance that highlight the iridescent colors of the snake skin. If you would like to know more about this project, then please visit the official project website Snake Appearance Model. Below you can see a beautiful rendering of a snake 3D model using our practical snake skin reflectance model roughly matching the general appearance of a Xenopeltis Unicolor!

Rendering Xenopeltis Unicolor

Team Members: Juan Raul Padron Griffe, Diego Bielsa

Github repository

If you are interested in reptiles and their beautiful skin colours (pigmentary and structural) and skin colour patterns, then I would strongly encourage you to visit the official website of the Laboratory of Artificial & Natural Evolution at the University of Geneva!

Twitter
# Appearance Modeling # Rendering