This week I was playing with Kerkythea material trying to find glass material which I couldn't find among those ones in the Glass material pack. Even not satisfied with the initial result I was thinking there isn't a way to get the effect I was looking for, but a colleague at DeviantArt has suggested something I could apply to Kerkythea and get a much better result. It happens in two steps:
and here is the comparison before/after:
and here is the comparison before/after: