water - air to underwater transition

V-Ray V-Ray Common Public
1

Hellou,
in mentalRay is possible to achieve soft transition between `air & underwater` like this :

( source http://mentalraytips.blogspot.com/2007/06/nice-water-with-miamaterial-arch.html )

How can it be done in Vray ?

2

EDIT : Wrong sample image , i meant transition like this :

3

play with your fog settings would be my guess