On the first image, I tried to emphasize the sunlight through the clouds, so I used the masking layer on parts of clouds that were being it by light, making it brighter than it actually was. And on another layer, I used masking to brighten the water because it was so dark.
On the panoramic, I only used three images. I brightened most of the images through masking, as well as leveling it. A little bit of hues and saturation was also being used, but for these images, the changes did not do much to bring them out.
Images credits belong to Professor Grant Adams.