Very good Marcello!
To be honest I liked some of your previous iceberg renders a bit better, mostly because of the colour-palette and contrasts in the images.
This image is a bit dull if you consider lighting and colours, but therefore not less realistic.
However, the shading of the ice is really nice and has quite realistic scattering. I suppose you used a lambert shader there?
As others said the water is splendid!
Cheers,
Martin
