У вашего броузера проблема в совместимости с HTML5
Water I spent some more time working on water effects this week. Now when you run/walk/jump through water you’ll get splashes and foam. There is a more subtle effect for sneaking and you make no sound. There are no effects for swimming yet, as there are no animation hooks for me to hang my effects from. Hopefully that will come in the next couple of weeks so I can then get the full set of surface effects done. Then I took a look at the rain and ended up adding some additions to the set-up and tweaking some value to make it feel better.