If I apply a gather node to the glass material, I get quite an interesting effect. My soda's 'glow' does intensify. It actually looks like someone shook the soda bottle, put it down on the floor, and then took a picture of it. The soda sort of looks like it is roiling inside the bottle. Quite interesting. However, putting a gather node onto the floor also doesn't seem to develop a glow on the floor at all and my guess is that the soda object, being inside the bottle and not directly sitting on the floor is the cause and thus that would be where postwork would have to be used. Unless I'm not doing this right at all.

"A lonely climber walks a tightrope to where dreams are born and never die!" - Billy Thorpe, song: Edge of Madness, album: East of Eden's Gate

Weapons of choice:

Poser Pro 2012, SR2, Paintshop Pro 8