Advanced Organic Modeling

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Advanced Organic Modeling

• Luká Duchovic, Martin Gramblicka, Michal
  Gapierik, Michal Chovanec
• FMFI UK MRT
• 15.11.2007

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Overview

• Outro
• History
• Modeling techniques
• ZBrush
• Intro

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Non organic models
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Organic models
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Advanced Organic Modeling

• the modeling process was very long in the past
  and the product was not so perfect as its
  creators wanted it to be
• it is possible to achieve great models in short
  time today

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Advanced Organic Modeling

• the revolution was brought by ZBrush and programs
  like it, for example Mudbox, etc
• these programs take use sculpting

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Modeling techniques

• nurbs
• subdivision
• displacement mapping
• sculpting

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NURBS

• non-Uniform Rational B-Splines
• mathematical representations of 3D geometry
• describe any shape from a simple 2D objects to
  the most complex 3D organic surface or solid
• flexibility and accuracy

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NURBS

• 1996 Steve Burke

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Subdivision

• method of representing a smooth surface
• replacement of NURBS
• process of subdividing each polygonal face into
  smaller faces

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Subdivision

• Geri's game, Pixar, 1997

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Displacement mapping

• alternative computer graphics technique
• part of high-end rendering systems like
  PhotoRealistic RenderMan(Pixar)?
• displacement Maps create real bumps, creases,
  ridges, etc in the actual mesh
• do everything that changes in real geometry can do

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Displacement mapping
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Sculpting

• interaction with computer generated geometry as
  if it was clay or stone by using tools to push,
  pull, smooth, grab...
• most of digital sculpting tools use
  multiresolution
• a digital pen with pressure sensitivity can
  provide added functionality for sculpting software

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Sculpting
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Softwares

• MudBox
• Silo
• Modo
• Zbrush

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MudBox

• a 3D sculpting tool
• developed by Skymatter
• primary application is high-res digital sculpting
  

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MudBox
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Silo

• 3D modeling application with the ability
  sculpting high-polygon models and precisely
  controlling hard-edged surfaces
• developed by Nevercenter

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Silo
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Modo

• developed by Luxology
• advanced features such as n-gons, 3D painting and
  edge weighting
• fastest rendering of any 3D software

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Modo
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ZBrush
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ZBrush history

• November 1999
• First release of Pixologic ZBrush
• December 1999
• Mensa International Journal - "Smart Software
• January 2000
• Computer Graphics World - videogame industry

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Zbrush History
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ZBrush history

• April 2000
• Computer Arts - ZBrush is an excellent...
• November/December 2000
• Mensa International Journal - ...can't live
  without this program...
• December 2000
• In-Depth - ...happen within the first few
  clicks...
• Spring 2001
• EFX Art and Design - ...is fast and responsive...
• December 2001
• Creative-3D.net - 1.23B one the most innovative
  and creative digital tools

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ZBrush history

• July 2004
• Version 2, more 3D tools, features and many
  improvements
• user interface
• modeling and object management
• new materials and textures
• more...
• December 2004
• The 2004 CG Retrospective - a long way since
  1999...
• December 2005
• The 2005 CG Retrospective - ZBrush takes the
  number 2 in CS top 20

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Zbrush History
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ZBrush history

• May 2007
• ZBrush 3 The Revolution Continues
• May 2007
• Interview with ZBrush Artist Sébastien Legrain -
  Zbrush 3 is a total blast...
• New Features
• Transpose
• Mesh extraction
• Real-Time Shadows
• Concept Sculpting
• Lazy Mouse
• Polypainting

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ZBrush

• connects 2.5D and 3D modeling, textures and
  sculpting
• specializes mainly on sculpting
• high details (virtually infinite number of
  polygones)?
• high-detailed model is often exported as
  displacement map and then used as low res model
  (detail simulation)?
• 2.5D models are also saved as pictures, which
  enables user to create complicated sceneries

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ZBrush

• pixol vs pixel
• it works with pixols
• they contain other information, like depth,
  material etc. besides normal information

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Zbrush - subdivision

• subdivision modeling
• replacement of one polygon by multiple polygons,
  that causes higher level of detail
• ZBrush offers "subdivision history
• we can select from different levels, which is
  positive

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Zbrush

• combination with another 3D applications(3DStudio,
  )?
• the model should consist of just quads
• maybe tris, but with the tris being in
  well-hidden regions(because of smoothing)?

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Advanced organic modeling

• pictures
• video

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A bug's life(1998), Pixar
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Witcher, 2007
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Crysis, 2007
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• Rozpravky je koniec...