Post by Truth Unknown on Aug 13, 2011 14:54:14 GMT -5
pSX does not feature changing the Display Resolution when the Internal Resolution changes. There is almost no enhancement added when scaled, but depending on Video Card (and Drivers) you could experience pixel aliasing (where pixel sizes are inconsistent and "warp" the output) which is somewhat corrected with the Bilinear Filter option.
One reason for keeping the Display Resolution static is to keep the Display active during the entire emulation and not obscured by the Display re-syncing on a resolution change as most PC monitors do. Another reason is most Displays and Video Cards do not support the various output resolutions the PlayStation uses.