Solution: Using masks to perform a complex black-and-white conversion

…So here's a solution to the Kachemak Bay Panorama challenge.…And when we look at this image, and this is a photograph, a panoramic photograph.…It's actually a combination of three photos that have been combined together.…And we see the southern Kenai mountains…and a beautiful cloudy sky in the background.…And then in the foreground, we have Kachemak Bay,…and little bit darker foreground areas in here on land.…And we look at the RGB values here.…We see, pretty high blue values.…

Not only in the sky, but in the clouds and on the mountains.…And then this is a little bit more neutral down here.…This is much brighter, than what we have in the foreground, so probably going to…separate these two areas, do the background…sky and then the foreground mountains and bay.…There's not just one way to do this, you could…do the mountains and the sky separately if you wanted to.…The way I've made the masks here is the,…foreground mountain and bay, and then the background sky.…Either way would work.…Let's go ahead and set our critical highlights and shadow points.…