Bead embroidery has very few rules.
You can bead on fabric, non-woven interfacings, Ultrausede, leather, needlework fabrics and more. Cork surfaces are excellent for the addition of fiber design elements.
You can leave surface areas unbeaded. Layering a base surface with a gauzy ribbon or fabric can dress it up and add elegance.
Ultrasuede can be printed, painted or markered with areas of color, with beading added along the color area edges, which can be decorated by rhinestone cup chain elements, metal daisy spacers, perhaps seed bead lines.
A narrow strip of non-woven can be layered with a same-width transparent metallic with silver design elements spaced over the surface. A sketched or printed design idea can be adhered to the back ofUltrasuede or leather, then beaded through the base so it shows on the front surface with the beautful base showing through.