Introducing Tob

Vatican Gardens, The Holy See

Vatican Gardens, The Holy See

Welcome to the home of Tob. My areas of interest and expertise include computer graphics in general, real-time global illumination and augmented reality. I am a graphics programmer at Unity Technologies.

This webpage features a portfolio of projects I'm working on (mostly open-source), publications I have been involved in and a casually maintained log to keep it all together. If you have any questions or comments regarding my publications, source code or other things, feel free to contact me (public key) at:

Alternatively, you can reach me on Twitter:


You can leave a tip if my code or blog was helpful:


@thefranke says



Apple engineers showed their cool new ray tracing system at WWDC and used some models from my page but "forgot" to put the model URL in their presentation as requested, so I'll do that for them here :)

Peter Shirley


#CVPR2018 papers are up!



Light propagating in water reaches a plane surface separating water from air. A fraction of light reflects back and the remaining fraction refracts to air. As the incident angle goes up more and more light reflects until the critical angle is reached