Uhm. the shade of green you chose looks off at first glace but when full viewed, it looks f*kng amazing! but i do wish you did NOT use the stained glass effect and just left it at that. I can obviously see your lack of PhotoShop experience and it would be best if we did not show that, shall we? :p
Although the shade of green is stunning, its not completely cohesive. There are parts, even when downloaded over the 800x600 resolution that looks a little "unclean". I don't know what caused it, but I think you have to nicely blur those and resave it so it kinda just goes away. It spiffs me a bit.

And and, I shall commend you for the amazing clean scan. Just less obvious PS effects, like the drop shadow. It works for a while, but once you figure out how you made it, I kinda lost interest.

Eitherway, its a cool wall you made there. :)