With the upcoming release of Vue 10, Paula Sanders published a well explained tutorial about the new feature and discuss there the impact of various factors around Vue 10's new Physical Sea Water and Underwater Caustics. Physical water adds absorption and scattering parameters to allow for realistic light absorption in the body of water. Ocean waves now accurately affect incident light to produce realistic underwater caustics. He is comparing the Default Metawater against the Physical Sea Water and discusses the settings and parameters inside each one.
Every step is fulfilled with screenshots and you can clearly see the advantages and results of the new Physical system inside Vue 10. You can also download the new Vue 10 Infinite - Build 10007731 – BETA and try it yourself. More information and the whole tutorial in the link bellow.
Source and full article: http://www.perpetualvisions.com