[quote="ZenJu"] It seems you tested with "aspect=true", where Dosbox adds artificial lines (most noticeable with the numbers 81, 98, ect.). In contrast to the other scalers xBRZ is not really integrated into Dosbox, so this setting needs to be turned off, or it will give those artifacts.
PS: Please don't use lossy .jpg but .png files for comparison and include the non-scaled original image, so that it's possible to reproduce and verify the results. [/quote]
Thanks for the feedback. I redid the comparison: imgur.com/a/UiF2W
xbrz looks pretty good, and I like that there's less stretching than the other scalers, though I still prefer the aspect corrected.
(yeah I don't know why BBCode is off and I don't see how to turn it on)