I like the idea, but a couple of changes might strengthen the scene. First, the lighting on the floor does not match the lighting "outside". The direction of the light inside is from the rear, right, where the lighting on the trees is is almost completely the opposite. The wall has no thickness. With light coming in at that angle, it would be also lighting up the sill and frame. Sunight coming from outside would also reflect a little on objects in the room, such as edges on the chair, any reflective surfaces, etc. Remember that we do not live in a vacuum, so even the air itself carries some residual light reflection. Finally, the sword has no light on it, so should also be silhouetted, or if you mean for it to be magically lit, perhaps a glow would carry that off better. Anyway, it's a in interesting scene with some inherent power.