Jim Blinn

The Blinn-Phong model, introduced by Jim Blinn as a modification of the classic Phong shading model, replaces the reflection vector with a halfway vector between the light and viewer directions. This simplification is more computationally efficient and is still used in real-time graphics and as a default lighting model in many rendering pipelines.

Blinn produced the famous computer-animated visualizations of NASA planetary flyby missions at JPL in the late 1970s and 1980s, including the Voyager encounters with Jupiter, Saturn, and Uranus. These animations were broadcast on television and were many people's first exposure to high-quality computer graphics.

Blinn invented bump mapping in 1978, a technique that simulates surface detail and wrinkles on 3D models by perturbing surface normals without adding geometric complexity. He also developed environment mapping and reflection mapping techniques that are still fundamental to real-time graphics today.

Blinn wrote the popular 'Jim Blinn's Corner' column in IEEE Computer Graphics and Applications for many years, explaining complex graphics concepts with clarity and humor. These columns were collected into book form and became valued resources for graphics programmers and researchers.