The bender painter example requires the HEAD version of minium (which now has support for CommonJS in Rhino). If you want to run it, you'll have to build minium manually, and inside minium-app/target/minium-app, edit app.properties:
rhino.require.module.path = file://<path for minium-require-lx-meetup3 scripts>/modules
Also, check for full paths in those scripts :)
Any problem at all, please report it, I'll be glad to help you!