Caustics in metals

[fa2020]

Hi guys,
I recently rendered a ring modeled in Zbrush. The main material of the ring is chromatic but I couldn't get any caustics effect of the HDRI lighting over the surface. I tested Keyshot but it rendered a nice caustics. Can anybody help me? Does Corona support caustics for metallic reflections?
https://forum.corona-renderer.com/index.php/topic,14504.0.html

[maru]

You will probably need to increase MSI to get visible caustics:
https://coronarenderer.freshdesk.com/support/solutions/articles/5000515636

Also, they might not be clearly visible on a reflective surface.