I know how to use both but in my case Photoshop is a great friend because I don't have a great computer so I use alot of Photoshop tricks to make my renders look high quality, and sometimes do things that are imposible otherwise, like the next render I did for a contest on a discord channel.
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Most of what you see comes from Daz, that doesn't mean that most of the work is done there. But please don't get all hipster or purist with this, what really matter is the final result and what anyone want to do with it.
This is still a Daz Art regardless of the use of Photoshop.