Hi, Mike, You may be interested in the post below, covering 4D ray-tracing implementations benchmarking, where LJ2 loses the battle against Google Chrome. I'm not making any conclusions from that — I did not look on the code, so please don't get angry. :-) In Russian: http://habrahabr.ru/blogs/algorithm/113250/ Translation: http://translate.google.com/translate?js=n&prev=_t&hl=ru&ie=UTF-8&layout=2&eotf=1&sl=auto&tl=en&u=http%3A%2F%2Fhabrahabr.ru%2Fblogs%2Falgorithm%2F113250%2F&act=url Alexander.