How Can I take good quality screen shots from diferent cameras?

Hi Everyone, I´m working on archviz. In the editor I created a few cameras. I made some High Res screen shot from the editor but the quality is not the same like in the viewport. It has noise and to much reflections. Then I tryed to do in the game with the comand bar and it was better but the thing is that I need to save the positions of my diferents cameras. Can I create diferente cameras in the game and change it to take screen shots from the game? How do you think Koola takes his screen shots? It looks very good quality.

Thanks!