Where did you get that cool potted tree? What is it?
Are you going to be misting the area also? I have a large FR (my chams live FR 24/7) and my advice is to tack up clear shower curtains on your walls. The moisture will either make your plaster bubble or will leave brown/gray water stains on your walls (the mist washes the dust off things and dust mixed into water sticks to the wall). Also, the water may leach tannin out of the tree, which will stain your walls brown/orange.
If that were the Anaheim Ducks banner, I'd tell you to leave that on the outside of the shower curtain (Bruins fan here), but I have nothing against the Oregon Ducks, so that can stay inside the shower curtain.