Blog | Texel Talk | Implementing an exposure map

The Virtual Reality software STP VR helps police forces train for dangerous scenarios of their daily work on duty. Because body motion is tracked and recorded, each trainee's behavior can be analyzed in detail after a session has ended. At the core of this analysis software is a three-dimensional heat map, showing all the surface areas a particular player has been looking at, and for how long. If you imagine a camera as area light and the entire scene's surface covered in film stock, it captures which parts of the film were particularly exposed, and which weren't. In this article I'd like to break down my failed and successful approaches to implement this so called exposure map.