Hi @YujiangW @Luoshuang !
I have made some very little tests:
Almost no changes between Irradiance Caching and First bounce options. Maybe in…reflections (?). In 5.0 changes were more evident (I don’t know if better or worse, but more noticeables):
Also, Indirect lighting intensity values don’t seem to work:
And if a Light is stationary, its direct lighting can’t pass translucent materials, but its indirect lighting can:
Thank you and best regards!