Many years ago, I bought a book, by and about the famous 20th century pro photographer Alfred Eisenstadt.
He was born in Germany in the late 1800's and I believe from the 1920's on was a photographer for Life magazine, which at one time and for many years, was huge in circulation. He covered everything and everywhere...Europe, Africa, North America, etc. and I always enjoyed his photography, his work and his photographic eye.
In his book, he said as a boy he used to love going to art museums in Europe (mainly Germany at the time, where he lived) and study the use of light, by painters such as the Grand Masters.
I've followed his advice and looked at who I consider the greats...both in painting and photography. Might as well learn from the best, is my theory.
He indicated that it was quite an education and he was able to learn a lot, by observing their work.
I know I've incorporated photography in my discussion. I apologize for my transgression.