Eric Edelo has released Prism, an alternative glass shader for Cycles that offers easy to use caustics effects. The sample images are quite convincing!
That is the reason why I created Prism, to remove these limitations and even discard their existence, to provide easy-to-use controls and full control of these features. As an artist myself, I want focus on the creative process rather than try to battle noise, artifacts and poor results.
That’s what Prism is for, to remove all the bothersome and tricky parts of the glass shader and only expose the fun parts, while providing a shader that just works, no fuss! Prism is the beefiest update to Cycles glass shader you can find!