Black & White – Adjust Color Luminosity
I wanna start with this very, very first group. It's titled Black and White. We have a layer called Venice. Above that I'm going to create a black and white adjustment layer. The black and white adjustment layer gives you all these sliders in the properties panel. They allow you to control the original luminosity of the colors found in the layers below. If I adjust the red slider, you'll see that the building or the buildings would change brightness, because that's what the slider does. It controls the original red pixels found in the underlying layers. But, if I change the blending mode to luminosity, you can now control the luminous values of those colors. This adjustment layer sort of gives you an extra feature simply by changing the luminosity. You can adjust the luminous values of the original photo. For those of you that work with Lightroom Classic or Lightroom CC and Camera Raw, you might recognize a similar feature. I'm gonna go into the Camera Raw filter, and under the hue, sa...
turation, and luminance, you have that same feature. For those of you that are paying really, really close attention, this panel here gives you more options. It gives you purples and aquas, which are not found in the black and white adjustment layer. You do get two more sliders. The downside of using the Camera Raw filter is that if you don't apply it to a smart object the filter becomes destructive, which means that you're actually changing the pixels, and you usually don't wanna do that. You usually wanna be able to revert back to the original pixels. The second downside is that if you're using a smart object, the file size may become too large. If you're just working with a single layer, a single photo, it's fine. You won't run into any problems. But, if you're working with large composites you usually don't wanna have a lot of large, smart objects, because then your computer will be too slow to work with. That's an alternative method of adjusting the luminous values of your layers by using a black and white adjustment layer and changing the blending mode to luminosity.