I have a couple of these.
https://www.universalrocks.com/aquar...ds/ledge-style
These can get a bit pricey but they are tough as nails.
This is a background with ledges and it is a bit more expensive.
http://i772.photobucket.com/albums/y...a/IMG_2631.jpg
http://i772.photobucket.com/albums/y...a/IMG_2626.jpg
This one is from the same place but much less expensive. I was just starting to set up my boa cage here on the bottom and this is a nice view of the background.
http://i772.photobucket.com/albums/y...a/DSC01255.jpg
For a royal, I think this would be a good option.
I've seen some very nice DIY stuff as well.
There are a lot of options. Good luck!