Really nice project. Love the shading displayed here! Please keep posting those in progress images. I really enjoy those 🙌

Great video. Really looking forward to the other videos of his!

I have checked in the new Octane and did not find a way. Maybe. There are some workarounds splitting lights in to caustic emitter lights and diffuse / reflection / refraction lights. And therefore get a light pass with just the caustics. But its a bit tedious to set up.