I'm not usually into this sort of sci-fi machines flying everywhere sort of thing, but I really liked your piece. The touches of orange really made the whole thing stand out, it's so subtle but so full of warmth and energy. It really compliments the green, and the brush stroke sort of feel to it makes it feel like a piece of concept art, haha, now that I look under the title I realize it IS concept art well then, that speaks for itself then doesn't it? You've done your job very well
hm ... you asced how this is mechanical ... and i told you that there is nothing else than mechanical elements. so don't get why there is no sense in it (sorry for the bad english, but i'm normaly not talking english) i mean, there is nothing else than machines. future machines in future scenario. that is what i meant.