After posting this I updated the look a bit. This is the latest version of the image ^^
I recently started playing around with Lux Core Render as I wanted to be able to render nice caustics inside Blender. The results were pretty nice considering the render time and well… Now I gotta say. I am a Lux fan.
However, I still wanted to be able to use Cycles for the main pass. The workaround was to render with Lux in a duplicate scene. In Lux I set the settings to 100% Light Rays so no camera rays were traced, but only light rays. This turned out to work pretty flawlessly and in around 2 min I got these pretty nice-looking caustics.
For this example I bumped the caustics up to 11, just to test it out - And because NOW I CAN FINALLY RENDER CAUSTICS!! But I know this is obviously way over the top.
Thanks for checking out the RnD project!
Happy blendin’ everybody.