The mold for the Cthulhu small wall relief is curing as I type this, as well as the mold for the "Palms" design, part of the City of the Twin Serpents series of artifacts.
The white squares are pieces of foam-core board with dome-shaped plastic cabochons glued on face down into the silicone molds. These will leave an imprint in the cured molds that will anchor the plaster reinforcement base that will be later poured in once the foam squares are removed.
Stay tuned for the first pulls!