Wooowwww! That environmental lighting is so rocking it!! Tractor looks really fine, except I'm dubious about the amount of polys used to get that screen right. Why don't you just use a bump map for that? Even a good diffuse would cut down all those unnecessary lines.
Ok, brilliant advice guys. I've decided to remove the craters and have the main idea behind the scene the idea of the impact being imminent, rather than happening. So no meteors have crashed yet! I've really messed with the particles to make them look more interesting. I think it looks more like oil/petrol burning smoke,…