Some questions about ArchViz

Well yeah, it’s on preview, but if you wanna see if it works I guess it’s enough. Do you really need to use to higher settings to tell if it looks good or not? I’m using UE since a couple of weeks so everything I do it’s probably wrong.
I’m used to do mainly stills and usually you crank up the quality just for the final products, so I’m using the same methodology here.