I saw this photo of a master bedroom ceiling and wall and I liked how it really makes the room glow. I want to do it to my own master bedroom but I cant seem to find a construction detail so that my handy man can do this for me. How was this ceiling supported anyway? Am I running into problems by trying to carve out my existing ceiling to put in LED rope lighting?

Ps. I dont want to use crown moldings. This is a modern looking house and there are no moldings anywhere throughout the house.