Judging by the photos, these plants are real. Raised floor. Then there's the waterproofing. Or it could be pots, which are set in a niche. Special, ovesea (but in reality, special lighting for plants violet color).

Yes, if they are real and the floor is raised i wonder the depth of it..?
Nice solution anyway and beautiful interior.

Much simpler plants to choose at a certain depth, because the root systems of all plants are different. Approximate height of 15-20 centimeters.

Exactly that is what im thinking,because regarding these plants the depth should be 30-40cm, my guessing.