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