I don't do mirrors, but what about adding a slight pool reflection to the "glass"? For awhile I used to make shadowbox graphics, adding that slight pool shadow and taking it really transparent, made a lot of difference in the glass. just a thought....

3-D Arena | Instagram | Facebook

I do not feel obliged to believe that the same God who has endowed us with sense, reason, and intellect has intended us to forgo their use.
-Galileo