How to marble ceramic: Use a base of shaving cream, add drops of ceramic paints, swirl, and dip item to create marbled effect. I've tried this, and it's kind of fun.
making tiles at Natalie Blake Studios
Casting tiles using folded paper molds for the prototype process to reproduce the effect of folded paper in ceramic - "Folded" designed by Raw Edges for Mutina, 2010
Concrete tiles cast on fabric $10
Plaster Casting of Origami Models | by EricGjerde
The Soft Hard by MATSYS. Using a flexible fabric as a mold, this "soft" form was cast from plaster.
Tessellating plaster cast panels for Andrew Kudless' Generative Design seminar at CCA
concrete from fabric molds
eva jospin | took cardboard cutout to a whole new level.