This is what I got so far on the background. I made the stone tile for the floor by hand and tilt it using the perspective tool. I'm happy with the tiles but don't like the grout at all. Not sure how to fix it however.

The wall I used a picture I took and modified the color. I'm thinking of adding wall sconces and maybe curtains to each side of the throne on the back wall. I probably do it after coloring the rest. It's taking too long (as usual) and I want to get that done.