I’m pretty sure this is not possible at the moment unless I’ve missed something.
I think it’s a no-brainer, considering the fact that we have PBR system now.
Here are some caustics baked on to the lightmap in assassins creed unity:
Check out the video at 2:23
Here is a screenshot for the lazy:
And I feel it helps ground glass materials as well specially for stuff like bottles, glass sculptures and so on.
Does anyone know if there any plans to implement this? What are your workarounds right now? I personally try to avoid any glass structures since I haven’t found any way to make them look integrated with the environment.