It’s just dynamic light, I did not even build the lightning with preview settings. Others can spend their time fiddling round with the lightmass setting and wait for built time whereas I prefer to work creatively in that time.
Also I don’t want to show off good lightning here, but my good metal material and furniture instead. And that goal has been archieved.
Tyson’s bath is pretty dark and very slippery with the marble floor tiles. That why i chose carpets and wooden floors to get rid of the traditional wet-cell feeling indoors. Outside on the terrace its a different thing of course.