Well then, if the car is tiny, then perhaps making it a small part of the image would reinforce that. In my mind's eye I can see a large field, just as you have it, but with the car being closer to the lower right "power spot" and maybe a quarter of the size of image you have in the one above... There will be less car, but at the same time it may convey the feeling of "smallness" better. Just sharing a thought. Feel free to ignore if you already considered it and rejected it on aesthetic grounds.