Yeah, you use the info in that link to set your screenshots to whatever res and quality you want. However, you still have to manually or batch convert your screenshots to 720p or whatever downscaled size you want. This is the best method for taking high quality screenshots IMO because you don't need to crank up the AA in the game. You just play it like you normally would and the performance level you normally get. When yout take a screenshot (I've bound the function to 'U') it takes the engine about a second to render the image at the resolution you set. It then saves it as a .tga file. Mine are usually around 30MBs. The downscaled images look like they've got a retarded amount of AA as you can see.