• Xbox 360 Development Kit

• Commercial Project
• Completed 2007

From 2004 to 2007 I shipped 22 releases of the Xbox 360 Development Kit (XDK) as a member of the Xbox Graphics Team. These monthly (and later bi-monthly) releases included all of the software, hardware, and tools nee...

• Final Stage Path Tracer 2.0

• Personal Project
• Completed 2016

Path tracing is a straightforward technique for rendering physically correct computer generated images. In 2011 I completed the first version of Final Stage, but later decided to refresh the project with some addition...

• Imagine Framework

• Personal Project
• Completed 2013

Imagine is a 256-bit image processing engine that serves as the foundation for several of my game, graphics, and computer vision research projects. I began this project in 2009 after scouring the web and being unable ...

• Windows Development Kit

• Commercial Project
• Completed 2008

The Windows SDK enables developers to build, test, and release software for the Windows and Xbox platforms. This SDK was first released in 2007 after Microsoft combined the DirectX and Xbox SDKs into a single package ...

• Perceptual Image Hashing

• Personal Project
• Completed 2014

Insight is a perceptual hashing engine that enables fuzzy image comparison through the estimation of visual similarity. This system detects structural similarities and is invariant to scale and rotation, so it is part...

• JavaScript Path Tracer

• Personal Project
• Completed 2012

This is a reduced and non-real-time port of Final Stage, my real-time path tracer, to HTML5 using JavaScript and the canvas element. This version supports most of the same visual features, but lacks support for shade...

• Dynamic Coverage Anti-aliasing

• Invention
• Completed 2009

Anti-aliasing is an important technique used to reduce the appearance of jagged edges in raster based graphical systems. Traditionally, the cost of using anti-aliasing is significant, and usually scales with resoluti...

• Global Illumination Lightmaps

• Personal Project
• Completed 2002

Lightmapping is a simple technique for baking high quality lighting information into textures for static lighting environments. This process gained popularity in the mid 1990s for its visual quality and efficiency, an...

• Vision 3D Game Engine 3.0

• Commercial Project
• Completed 2014

The third evolution of my Vision 3D game engine focuses on mobile game development. The engine has been significantly upgraded with modern rendering, physics, audio, gameplay, toolchain and testing technologies.

• Fast Scene Traversal Using Octrees

• Lecture
• Presented 2014

Octrees are one of my favorite spatial data structures because of their simplicity and efficiency — they're easy to understand and visualize, and can significantly improve the performance of a task. The Final St...

• Primitive Texture Compression

• Personal Project
• Completed 2011

This is a very simple compressed image format that I designed in 2003 as part of my Vision 1.0 project. PTCX features a basic adaptive quantization scheme that is reasonably effective for low frequency texture informa...

• Final Stage Path Tracer 1.0

• Personal Project
• Completed 2011

Path tracing is a straightforward technique for rendering computer generated images. This research concluded with a functional GPU based path tracer, called FinalStage, that is designed to generate images in real-time...