Brian Koppelman, showrunner for the TV series "Billions", has thought a lot, and written a lot, about the creative process, providing a fascinating behind-the-scenes peek at how it's done. He's refreshingly candid and shuns dogma at every opportunity which endeared him to me, a self-taught photographer.
Here's a bit of advice from a blog post of his about screenwriting:
But for someone who wants to be an artist, a creator, an architect of an original vision, the best book to read on screenwriting is no book on screenwriting. The best seminar, no seminar at all.
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