This image worked well for me in black and white, I used a graduated filter to really bring out the drama in the clouds.
This image has two different subtile tones from right to left. The amount of sun in each picture varies slightly but it gives the image an interesting difference in hue.
This image is a long panorama, it’s almost a 180 degree view but it doesn’t look too distorted. I used a graduated filter to bring out the tones in the clouds.