Osis Rough Up Modelling Clay Get rough n raw styles with Osis Rough Up modelling clay for rough texture and separation. Rough Up gives re-mouldable style for a rough, ready and natural grunge texture. OSiS Rough Up has neither shiny nor matt effect - just natural shine. The medium finish control means you can adjust your style as and when you please. Rough Up has an OSiS Control Level of 2 for medium style definition and creation.