Here is some more caustics from Vue 6i (pre-release). Both are GI lighting:

This with a spotlight and cylinder with water material (the bright ring is the spotlight beam being a bit bigger than the cylinder. Outstanding water caustics, i'd say!
Congrats to the developers!!!

 

This is a red and a blue spotlight, with a wine glass i made in Silo 3d:

Vue 6i (pre-release) lighting is looking very nice!