I also made a concept of some icons altho lacking in detail. I went for a simple look.
@tatsu I've made some progress with photorealistic textures as you sugested, I enjoy the outcome but would be great if the change is begin made from 40x20 to 80x40. And perhaps do you know when the deadline is?
I have to correct some stuff to make the ranking a bit more clear. Here is how they would look.