I’ve just had the huge pleasure of posting a guest blog by the award winning Canadian mosaicist Julie Sperling on how to use thinset for mosaics. http://helenmilesmosaics.org/mosaic-tutorials/using-thinset-for-mosaics/
Opus variatum or biggsum, opus drostleum, opus fluctum and opus opusum - examples of the new opuses which I’ve added to the lexicon in my latest blog post: http://helenmilesmosaics.org/mosaics-miscellaneous/andamento/