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9. Photorealistic Hair Modeling, Animation, and Rendering
Sunday, Half Day, 8:30 am - 12:15 pm
West Hall A
Level: Intermediate

An in-depth review of the three main challenges in hair simulation: hairstyling, hair animation, and hair rendering. It includes an overview of various proposed solutions, their strengths and weaknesses, and the latest methodologies pertaining to each challenge.

Two novel shape-modeling paradigms for hairstyling (hair as streamlines of fluid flow and multi-resolution definitions of hair) are summarized. For hair dynamics, the course covers an elaborate and viable stiffness-dynamics model of an individual hair strand and presents two novel models for complex hair-hair, hair-body, and hair-air interactions. Hair-rendering topics include shading models, multiple scattering, and volumetric shadows. The course also reviews recent advances in programmable graphics hardware in the context of hair rendering and advanced issues in production hair rendering, self shadowing, and lighting models for short and long hair.

The course concludes with case studies of hair simulation in major academic and entertainment productions: simulation of ancient hairstyling in Pompeii (including a new approach to real-time modeling and animation), "Stuart Little 2," "Harry Potter," "Garfield," "Scooby Doo2," and "Chronicles of Riddick."

Attendees will gain a broad understanding of the state-of-the art in hair simulation and learn a variety of working solutions that they can readily implement in their production pipelines. This course is a "boot camp" for aspiring computer graphics researchers who are interested in physically based modeling in computer graphics.

Prerequisites
Strongly recommended but not required: familiarity with the fundamentals of computer graphics, numerical linear algebra, differential equations, numerical methods, rigid-body dynamics, collision detection and response, physics-based illumination models, and fluid dynamics.

Intended Audience
Graduate students, researchers, computer graphics designers, special effects developers, technical directors, or anyone interested in physically based modeling for computer graphics.

Organizer
Nadia Magnenat-Thalmann
MIRALab, Université de Genève

Lecturers
Armin Bruderlin
Sony Pictures Imageworks

Sunil Hadap
PDI/DreamWorks

Tae-Yong Kim
Rhythm & Hues Studios

Nadia Magnenat-Thalmann
MIRALab, Université de Genève

Ivan Neulander
Hans Rijpkema
Rhythm & Hues Studios

Pascal Volino
MIRALab, Université de Genève

Yizhou Yu
University of Illinois at Urbana-Champaign

Schedule
8:30 State of the Art for Hair
Magnenat-Thalmann
  Topic 2: Hair Shape Modeling and Dynamics
8:45 A Multi-resolution Technique for Hairstyling
Kim
9 Continuum Hair Model
Hadap
9:30 Modeling Hair-Hair Interactions Using Sparse Guide Hairs
Yu
10:15 Break
10:30 Modeling Hair Using Free-Form Deformations
Volino
  Topic 3: Hair Rendering
10:45 Lighting Hair With High Dynamic Range Images (HDRI) and Algorithms for Hardware Accelerated Hair Rendering
Neulander and Kim
  Topic 4: Case Studies
11:10 The Simulation of Ancient Hairstyle in Real-Time
Magnenat-Thalmann
11:20 Production Hair Pipeline at Rhythm & Hues Studios
Rijpkema
11:35 Production Hair/Fur Pipeline at Sony Pictures Imageworks
Bruderlin
  Topic 5: Questions and Discussions
12:05 Audience and Speakers

 
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Conference 8-12 August, Exhibition 10-12 August.  In Los Angeles, CA