Simulating a glass shader with dispersion, caustics and other wizardry in Cycles can be tedious. The architecture of vanilla path-tracing engines like Cycles just doesn’t work well with caustics. So… is there a workaround?
In this Blender tutorial we’ll explore the tips and tricks of creating the advanced glass material in Cycles, without compromising the quality (too much).
Advanced Glass in Blender – Tutorial Highlights
WARNING: To be able to follow along the tutorial, a decent video card is required. I have GeForce GTX 1080.
Advanced Glass in Blender – Cycles Material Nodes
Advanced Glass in Blender – Some Renders and Tests
Over to You
p.s. Also I would recommend to take a look at this thread at BlenderArtists, it’s full of clever hacks related to spectral rendering within Cycles.