WHAT PORN CONSUMERS WANT.
This is general and there are exceptions.
They want to imagine what they are seeing is real, they want to connect with the models, the action and above all the fantasy of the scene. The saying "It could happen to me." is the most important thing in porn.
This is true of lots of entertainment. When we play a computer game we want it as real as possible, when we watch a movie we often want to believe we could be the hero. A lot of entertainment is separation from reality, while being real in our imagination.
It's like we know we are not a super commando saving the world, but we are when we watch a Rambo movie. Well we imagine we could be.
Think about it as an example and be broad in your thinking.
The same goes for porn. The consumer wants to believe he can find girls, or guys if he's gay, he can fuck easily with his 12 inch dick and do it so well she screams the house down before fainting in exhaustion. You have to adapt that to your particular niche or fetish.
He does not imagine she's only doing it for the money, for a pornographer and is going to fake her way through the whole scene. And is about as turned on as the girls he meets every day.
The better image quality you show in porn the clearer the consumer will believe or not believe in what he's watching. Will a porn buyer go and buy 3D glasses to view 3D porn? Some will, but that porn has to be 3 times better than 1D porn to make him do it. And while you spend all your time and money getting the technical part right you're in danger of losing the main ingredient of porn. The porn.