Hi everyone,
I have a little question,
How do I let those cabinet doors shadow obvious after the selected Secondary solver?
Thanks in advance
Eric
Which version of Corona is this? It looks ancient. 
It looks like there is some kind of light behind the cabinets, so it probably illuminates them from the inside.
What I sometimes do is I create a plane material and put it in between the cracks. That way I can control how much of the shadows are actually visible just by pulling the plane more inwards or outwards.
Surprisingly it works pretty well.
Oh and I apply a black material to the plane. 
Talking about realistic rendering dayyyumm that is some advanced stuff moving the plane inside of the cabinets back and forward.
may be Corona Ray Switch material with black GI material---- some more simple variant than geometry option–
Always used in Vray for this type white furnitures---- something like generate GI–0 in object properties///
Also possible to use corona AO map////—
I would like to suggest to properly model cabinets with empty space inside and check for correct reflectance of materials, but i’m affraid that response will be as usual - “we can’t remodel everything, it’s too much work!” 
Thanks for you samples