1. [Publications](/publications)
2. Simple Environment Map Filtering Using Ray Cones and Ray Differentials

 # Simple Environment Map Filtering Using Ray Cones and Ray Differentials

  ![](/sites/default/files/styles/wide/public/publications/simple.png?itok=-YNWc8yf)

 We describe simple methods for how to filter environment maps using ray cones and ray differentials in a ray tracing engine.

 ## Authors

[Tomas Akenine-Möller](/person/tomas-akenine-moller)

Jim Nilsson (NVIDIA)

 ## Publication Date

Friday, March 1, 2019

 ## Published in

[Ray Tracing Gems](http://www.realtimerendering.com/raytracinggems/)

 ## Research Area

[Computer Graphics](/research-area/computer-graphics)

[Real-Time Rendering](/research-area/real-time-rendering)