I think cropping 80% of the image in this instance is not the best course of action. The whole concept is two men, seen seeking refuge in the shade, surrounded by oppressive sun, in a place that looks HOT. For me, the idea would be to emphasize the look of hot, bright weather in the sunlighted areas, and maybe make the shadowed, shaded areas a bit darker, since there is not enough good detail to make the two men visually rewarding. I think as shown, the shaded area is too light, tool gray, in tonal value...the scene needs a very stark, crisp, black and white rendering.