Above is a quick test render to see if caustics were working in the scene, and to my disappointment I'm getting nothing. I checked several tutorial videos to make sure I was doing everything right: the sun light is set to enable caustics, the glass is set to cast caustics, and the table is set to receive caustics. I also tried another render without the liquid in the glass, but that didn't help. The pool in the background is also having the same problem.
In an unrelated note, the refraction also seems wrong, based on how the straw is looking.
I added a simplified blend of just the table, glass, and a kiddie pool, to demonstrate the problem.
