Hi guys, thanks for the help!, I got to check why I'm not getting notified of my forum replies. Not in my spam either
Anyway, I tried everything, works great as two separate object, once joined it disappears, I can select the sub-object liquid and move it out of the glass and looks fine. So materials seem to be right. Also I can adjust the absorption to get a liquid that shows up finally but then the models looks non smooth, polygonal edges if that makes sense. The reason I wanted to keep it one object is cause I'm using Forest Pro to scatter drinks. Unfortunately Forest Pro Is a bit of a pain for Grouped objects.