Here’s a project I did a while ago for a presentation to some investors.
I modeled the apartment in BricsCAD.
The soft furnishings I got off the Unity asset store they are by: Onesquarefoot: http://www.onesquarefoot.in/
The Bathroom I can’t remember where I got that from. I think it was the 3D warehouse but I had to heavily modify a lot of it in Blender.
The female model I got from Make Human : http://www.makehumancommunity.org/
The sea creatures were by Janpec: https://forum.unity.com/threads/sea-life-pack.121410/
Nearly every effect is faked: The outside water is all post processing with quite a few render layers. The light caustics were faked using a voroni texture animated lamp. The reflections had to be rendered on a separate layer and composited in.