Usenet archives downloaded from the Internet Archive:

https://archive.org/details/usenet-alt

This collection was scraped from groups.google.com in 2012.

alt.ascii-art                [original ASCII art discussion group]
alt.ascii-art.animation      [is about animating ASCII art]
alt.ascii-art.endless-blabla [an off-topic follow-up troll-trap]
rec.arts.ascii               [primary moderated ASCII art group]
pl.rec.arts.ascii            [polish ASCII art group]
de.alt.rec.ascii-art         [german ASCII art group]