IRC / ANSI art

does anyone know correct settings for displaying IRC / ANSI art correctly in mIRC?

yesterday i was playing with fonts and settings and mostly got it displayed correctly, but with small line artifacts:



the only useable font for this task is Fixedsys Excelsior with 12pt height:



i thought, the problem might be a spacing, but the only possible option for it is Single:



what else can be set in mIRC to get IRC / ANSI art displayed correctly?

here is a picture source, which is shown on screenshot:

Source