Jason is a Software Engineer at Valve, where he works on real-time 3D graphics techniques across all of Valve's projects.  Prior to joining Valve, Jason was the lead of the 3D Application Research Group at ATI Research for eight years.

Jason received a B.S. in Computer Engineering from Case Western Reserve University and an M.S. in Electrical Engineering from the University of Cincinnati. He has also studied at the University of New South Wales in Sydney, Australia and worked in Tsukuba, Japan through the National Science Foundation Summer Institute in Japan.

• Symposium on Interactive 3D Graphics and Games Program Committee, 2005-09
• Graphics Hardware Paper Committee, 2005-2008
• SIGGRAPH Reviewer 2002-2008
• Game Programming Gems 5, Graphics Section Editor
• ShaderX3, Image Space Section Editor
• Journal of Graphics Tools Reviewer

• Jason L. Mitchell, Moby Francke and Dhabih Eng, "Illustrative Rendering in Team Fortress 2," International Symposium on Non-Photorealistic Animation and Rendering, 2007. Movie Slides

• Pedro V. Sander, Natalya Tatarchuk and Jason L. Mitchell, "Early-Z Culling for Efficient GPU-Based Fluid Simulation," ShaderX⁵: Advanced Rendering Techniques, Wolfgang Engel, Ed., Charles River Media, 2007.

• Jason L. Mitchell, "Motion Blurring Environment Maps" in ShaderX4, Wolfgang Engel editor, Charles River Media, 2006.

• Pedro V. Sander and Jason L. Mitchell, "Progressive Buffers: View-dependent Geometry and Texture for LOD Rendering," Eurographics Symposium on Geometry Processing, July 2005.

• Jason L. Mitchell, "Real-Time Synthesis and Rendering of Ocean Water," ATI Technical Report, April 2005.

• Pedro V. Sander, Natalya Tatarchuk and Jason L. Mitchell, "Explicit Early-Z Culling for Efficient Fluid Flow Simulation and Rendering," ATI Technical Report, August 2004.

• Jason L. Mitchell, "Light Shaft Rendering" in ShaderX3, Wolfgang Engel editor, Charles River Media, 2004.

• Jason L. Mitchell, "Poisson Shadow Blur" in ShaderX3, Wolfgang Engel editor, Charles River Media, 2004.

• David Gosselin, Pedro V. Sander and Jason L. Mitchell, "Drawing a Crowd" in ShaderX3, Wolfgang Engel editor, Charles River Media, 2004.

• Pedro V. Sander, David Gosselin and Jason L. Mitchell, "Methods for Real Time Skin Rendering" in ShaderX3, Wolfgang Engel editor, Charles River Media, 2004.

• Craig Peeper and Jason L. Mitchell, "Introduction to the DirectX 9 High Level Shading Language" in ShaderX 2 - Introduction And Tutorials with DirectX 9.0, Wolfgang Engel editor, Wordware, September 2003.
  • MSDN Version: English, 日本語

• Jason L. Mitchell, Marwan Y. Ansari and Evan Hart, "Advanced Image Processing with DirectX 9 Pixel Shaders" in ShaderX 2 - Shader Tips and Tricks, Wolfgang Engel editor, Wordware, Sept. 2003.

• Drew Card and Jason L. Mitchell, "Non-Photorealistic Rendering with Pixel and Vertex Shaders" in ShaderX: Vertex and Pixel Shaders Tips and Tricks, Wolfgang Engel editor, Wordware, May 2002.

• Jason L. Mitchell, "Image Processing with Direct3D Pixel Shaders" in ShaderX: Vertex and Pixel Shaders Tips and Tricks, Wolfgang Engel editor, Wordware, May 2002.

• Alex Vlachos, David Gosselin and Jason L. Mitchell, "Self-Shadowing Characters" in Game Programming Gems 2, Mark DeLoura editor, Charles River Media, 2001.

• Alex Vlachos, Jörg Peters, Chas Boyd and Jason L. Mitchell, "Curved PN Triangles" ACM Symposium on Interactive 3D Graphics 2001, pp. 159-166.

• Alex Vlachos and Jason L. Mitchell, "Refraction Mapping for Liquids in Containers" in Game Programming Gems, Mark DeLoura editor, Charles River Media, 2000.

• Jason L. Mitchell, Michael J. Tatro and Ian Bullard, "Multitexturing in DirectX 6," Game Developer Magazine, pp. 33-37, Sept. 1998.

• Ravi Kothari and Jason L. Mitchell, "Detection of Eye Locations in Unconstrained Visual Images," IEEE International Conference on Image Processing, vol. III, Lausanne, Switzerland, pp. 519-522, 1996.

• Jason L. Mitchell and Ravi Kothari, "Human Point-Of-Regard Tracking Using ARMA, State Space, and Neural Network Models," IEEE Workshop on Neural Networks for Signal Processing, Kyoto, Japan, pp. 482-491, 1996.

• Connecting Visuals to Gameplay at Valve, Montreal International Game Summit, Montreal, 18 November 2008.

• Stylization with a Purpose: The Illustrative World of Team Fortress 2 at GDC 2008
  Highest ranked programming talk of GDC08 and fourth ranked talk overall
• Slides
• : Japanese Summary by Koji Satoh
• : Also covered at the end of this Japanese Article by Zenji Nishikawa

• Advanced Real-Time Rendering in 3D Graphics and Games Course
• ACM Digital Library (Notes and Recorded Presentation)
• Slides

• Advanced Real-Time Rendering in 3D Graphics and Games Course
• ACM Digital Library (Notes and Recorded Presentation)
• Slides, Notes
• : A two-part article in Japanese by Zenji Nishikawa: Part 1, Part 2

• John R. Isidoro and Jason L. Mitchell, "Angular Extent Filtering with Edge Fixup for Seamless Cubemap Filtering," SIGGRAPH 2005 Technical Sketch
• Slides, Video

• Pedro V. Sander, John R. Isidoro and Jason L. Mitchell, "Computation Culling with Explicit Early-Z and Dynamic Flow Control," SIGGRAPH GPU Shading and Rendering Course 2005

• Advanced Visual Effects with Direct3D at the Game Developer's Conference 2005
  • 3.0 Shaders

• Pedro V. Sander, David Gosselin and Jason L. Mitchell "Real-Time Skin Rendering on Graphics Hardware," SIGGRAPH 2004 Technical Sketch. Los Angeles, August 2004
  • Movie, Slides

• Presented part of the Real-Time Shading Course at SIGGRAPH 2004 in Los Angeles
  • HLSL Notes, Slides
  • Early-Z Notes, Slides

• Advanced Visual Effects with Direct3D at the Game Developer's Conference 2004
  • DirectX 9 Shader Models (PDF version)
• Light Shaft Rendering (PDF version)
• Now with streaming video of the actual talks!

• Presented part of the Real-Time Shading Course at SIGGRAPH 2003 in San Diego
  • View the Presentation

• Advanced Visual Effects with Direct3D at the Game Developer's Conference 2003
  • DirectX 9 Features
  • DirectX 9 Shader Models
• See Also
  • D3DX Effects and HLSL
  • Performance
  • Special Effects

• Real-Time 3D Scene Post-processing at the Game Developer's Conference 2003

• Hacking Next-Generation Programmable Graphics Hardware, CS 101.3: Hacking the GPU : Graphics Cards and the Future of Scientific Supercomputing. Caltech  Oct '02

• Applications of Next-Generation Programmable Graphics Hardware, Evans and Sutherland Distinguished Lecture Series. University of Utah, 7 October 2002

• DirectX 9 Shading, ATI Mojo Developer Day. London and San Francisco, 2002

• DirectX 9 Shaders & Hardware with Richard Huddy at the Game Developer's Conference Europe. London, 29 August 2002

• Presented part of the Course: State of the Art in Hardware Shading, SIGGRAPH 2002
  • Slides
  • Chapter 3 - RADEON™ 8500 Shading
  • Chapter 3.1 - RADEON™ 9700 Shading

• Jason L. Mitchell, Chris Brennan and Drew Card "Real-Time Image-Space Outlining for Non-Photorealistic Rendering," SIGGRAPH 2002 Technical Sketch. San Antonio, 2002

• John Isidoro and Jason L. Mitchell, "User Customizable Real-Time Fur," SIGGRAPH 2002 Technical Sketch. San Antonio, 2002

• Advanced Pixel Shading Techniques, Game Developer's Conference 2002
  • : Read some coverage in Japanese

• Advanced Vertex and Pixel Shaders, European GDC London, 1 Sept 2001

• Evan Hart and Jason L. Mitchell, " Hardware Shading with ATI_vertex_shader and ATI_fragment_shader," SIGGRAPH 2001 Real-Time Shading Course Notes

• 1.4 Pixel Shaders, Meltdown July 2001 in Seattle, London and Tokyo.
  • : Read the slides in Japanese