Keith Jeffery Email & Phone Number

Glendale, California

- Researched, designed, and implemented leading techniques in highly-scalable adaptive sampling, for which I was granted a DreamWorks Animation Technical Achievement Award.- Researched better real-time tone-mapping operations for adaptive sampling.- Designed and converted the distribution of work to threads for rendering from a locking O(n * m) algorithm (where n is the number of active threads and m is the number of raster-space 8x8 pixel tiles) to a lock-free O(1) dynamically load-balancing algorithm, saving minutes of render time per frame.- Designed a lock-free multiple producer/multiple consumer ring buffer with a contiguous memory layout that handles exceptions, allows dynamic, implicit addition or subtraction of producers or consumers, and can communicate data between the CPU and GPU using C++ and CUDA.- Implemented the de-noising tool for use at the studio, including innovative research. - Mentored several interns for de-noising applications and research, including machine learning applications.

Glendale, California

DreamWorks Animation is a studio that creates animated feature films, television shows, and other entertainment media. I added features and and provided enhancements requested from feature production for the REYES renderer and the Monte Carlo renderer.- Created the thread-safe, vectorized (SIMD) Monte Carlo sampling suite, including quasi-Monte Carlo methods and innovative progressive Monte Carlo methods and research. - Designed the public API for geometry shaders for the Monte Carlo renderer.- Mentored several interns for de-noising and geometry support applications.

Coeur D'Alene, Idaho

Chief Architect, Inc. is a leading developer of home design software for both the professional and home enthusiast. I added new features to the commercial software. Tasks included the following:- Wrote the physically-based, parallel, SSE-enhanced ray tracing engine from the ground up, including direct lighting, path tracing, bidirectional path tracing, photon mapping, and progressive photon mapping.- Conducted initial design for scene graph for real-time rendering engine.- Moved OpenGL rendering engine to modern techniques. Removed fixed-function pipeline and replaced it with physically-based shaders conducing lighting at the fragment level.- Implemented non-photorealistic rendering techniques, including hand-drawn lines, watercolor, and painting effects.- Organized lecture series for development team. Spoke on C++, Boost libraries, threading, and design patterns.

Master Of Science (M.S.), Computer Science

Thesis: The Design and Implementation of a Production-Quality Ray Tracer

Bachelor Of Science (B.S.), Computer Science