I definitely see the improvement on the back wall, but I think it still needs to be pushed a bit further.
The texture needs to have more contrast to it or be more in focus (does that make sense?).
Like the ground below the alien thing and dog is sharp and in focus, the creature is in focus as well as the bag, and since the light source is coming in what im guessing is a near straight down angle. I feel that the bumpiness of the wall would stick out more, and be as sharp as the ground is textured.
I dont know if the whole wall needs it, because I think as you get closer to the source of the light, the amount of light being smashed against the wall would obliterate any shadow...
I could be wrong.