The ray tracer will run in your browser!
The code is available on github. You can find some comments about this implementation on this article.
The biggest caveat is that this page will be clunky slow. Your browser might complain that the page is non-responsive, just wait. I also have reduced anti-aliasing in some cases.
Here we just test our ability to write to a HTML 5 canvas.
This will be slow, so it is generated separately. You have to click the button to do itif you click this, go have a coffee, or a beer.