go to console “~” and type “HighResShot (w)x(h)” or a multiplier. this works in “game” and plainly in the editor… Soooo:
Ex.
“HighResShot 1920x1080”
“HighResShot 2”
Adding multipliers will increase processing time and if you go too high it will crash depending on your Specs. I’ve been able to successfully render 7k images with this and they look amazing. Definitely a nice feature. You can also make a few adjustments by accessing the options under the viewport options dropdown and selecting High Resolution Screenshot…
Lastly, if you manipulate values in your Camera’s post processing volume, you can make some of the settings slightly more high quality, but for the most part you shouldn’t need that unless you’re looking for something specific.