Yeah, the scene I’m working on is a bathroom. So it’s a very small and easily controlled environment where I would want caustics (i.e, just 3 bottles sitting on the counter top).
I understand ray tracing is expensive although isn’t UE4 getting ray traced distance shadows in the 4.5 update? I just wish there was a way for translucent or glass materials to cast any kind of shadow like this, by default. Even if it was a very low quality kind of caustics, that would make a huge difference as opposed to there being no shadow at all (without resorting to lightmass).
Are there any game engines right now that have attempted caustics in real time? I think it could benefit Epic and UE4 greatly if they try to the be first in this field.