I just finished the first and I made it through in 2 days without really trying. I went through it a second time, trying to use the example code as less of a c

I just finished the first and I made it through in 2 days without really trying. I went through it a second time, trying to use the example code as less of a crutch and do it myself, while following different topics that came up. It's a great overview of the subject. I /really/ like that each chapter is fairly short, you have a working example at the end of each one, he explains both the concept and why he approaches a certain way in code. I should also mention, learning raytracing won't directly help if you're trying to learn realtime computer graphics.