To make this, I took 3 boards and put some wallpaper on them, then I join them together and made a cube/angle on the floor with them, then I put a desk light behind the corner to make the light spread through it. I took a pic of the scene, imported the pic in Photoshop to make ajustement and put the sea on it. And here's the result ! It's a real pleasure to physically make images even if it's with simple shapes, and I think the perspectives render is better than anything made with a software.