I think it is a good wallpaper. Sorry about your brother deleting everything. I hope you found an appropriate way to dispose of him. Here are the reasons why I think it's a good wallpaper: I like how you took the 3D image and created the images. I think the composition itself is good. The dark does give it a creepy feel, but personally, I always thought that Ryuk lived between creepy and amusing anyway. Creepy is good. The bad news? It's too dark. I can't see the big Ryuk's face and body very well. With the small Ryuk, I think you're in the ballpark when it comes to the shade of blue and rendering, but again it's dark enough that it's almost hard to see.

I think if you made the black parts of the room 4 shades lighter, there will be an improvement. In other words, make it look off black instead of inky black. If we see just a little more of the big Ryuk's body (you don't have to show everything. just an outline if you like) and do something to make the face keep its blue yet be seen clearer from a distance, you will have an A+ paper.

Right now, because it is so dark, it looks almost totally black on the thumbnail where we chose our wallpaper. I almost didn't know anything was there until I looked extremely carefully. That doesn't advertise your wall very well. Also, not everyone that looks at this site can see very well. Some people are in it for big designs and color because that is all they can see in this world. If all they see is black, they will pass on your wall and that's too bad because you have a good design. I think you have forms large enough for those with mild eye problems to see. So strangle your brother and play with the lighting, OK?