Together with UCLA, the Social and Public Art Resource Center (SPARC), founded by Judy Baca in Los Angeles 28 years back, runs the only lab that creates community-based digitally-generated public art for murals, the Cesar Chavez Digital/Mural Lab. SPARC also works with folks to create banners, websites, performances, video and public monuments.
“The Great Wall of Los Angeles” is pictured above. Started by Judy with local teens in 1976, and added to for the next 25 years, it is now in need of restoration. SPARC also has published a lot about muralism and has archives related to mural creation, so it is a great resource.