Request: Changable resolution for Fullscreen

[LunaMoo]

Except that lowered resolution will not be "native" anymore because lcd displays which are used by most people has constant size of "pixel" and forcing any different which is not exact multiplier, will result in pretty noticeable quality drop.

Unless you just mean huge amount of blur, then we already have solution for that, simply change screen scalling filter to nearest(I think only in git builds for now).

Screen scalling filter will not change anything in terms of how game renders, but will change the filter applied to stretching the resulting image to screen. Normally when it's set to linear as it was forced before, using resolutions lower than your screen will result in blur applied evenly to whole screen depending on resolution difference, with nearest, it'll leave it as sharp as it was before scalling making it look very similar to what you would get by changing fullscreen resolution to lower one on an crt screen, it might also be slightly faster(althrough probably unnoticeably).