Thank you so much for the critique! I haven't really used the curves adjustment layer much in the past, but seeing it applied to the different color ranges was really neat, I'll definitely test that out on future artwork. I notice I almost always have an issue with my shadows being too saturated on my paintings, so the color range selection tool will be very helpful for keeping that in check going forward. Thanks again for another great lesson! 

It surprised me to see how layer filters changed drawings so much when they were combined together. Thank you for the informative critique!