Yes, bloodsong, the pic is an unretouched render, and I believe that is a secondary reflection behind the water inside the glass. I was pleasantly surprised to see it myself. =) I'm considering lowering the transparency level of the glass itself just a bit; that might show a bit "harder" of an edge at the table. Alternatively, I could do a little fancy Boolean work to create a "rounded" bottom, rather than the straight right angle of the cylinder. I think I'm also going to dim the light just a bit, or maybe just add more falloff. I'm not sure I like the stark contrast of the shadow edge running diagonally down from the lip of the glass. I don't think that the opacity of the glass is the issue (an earlier render with a different light showed much more transparency in the glass), rather I think that there's too much light "filling" the interior of the glass. I don't think I'll touch the camera angle or object placement, for fear of losing that very cool secondary reflection. I am, however, going to back off the DoF a bit, to pull more of the floor into focus. Any other thoughts, or reactions to my ideas here, let me know! Thanks for all the input so far.