Any fabric or paper can be used for wall covering. You should have a smooth surface to begin with. Start with partitions of plywood of any grade that does not have voids in it, or fill the voids with putty or plastic wood.
Simply glue paper from shopping bags with neat logos on it, old grain or flour bags, labels from cans or packaging with nostalgic graphics on them, dressmaker or upholstery fabric, ripped rags with frayed edges in layers etc.. Seal the entire surface with Linseed oil(It will alter the color and eventually yellow) or varnish or shellac(shellac alters with moisture).
Tear odd shapes of paper shopping bags,(about hand size) leaving all the edges very uneven and ragged. Layer the pieces over each other, gluing each piece generously and individually...layer, layer, layer, till a rich and textured surface is achieved. Antique with oil based or acrylic paints or stains(acrylic dries FAST!) till a nice texture appears...Paint on and wipe off...use earth tones. Varnish or oil in a low luster for a leather look.
Single widths or ripped and layered pieces of natural linen can be applied and sealed. Ragged edges will be beautiful and provide texture.
Layer torn pieces of colored tissue paper, gluing generously layer upon layer. Include pressed and dried leaves and twigs in between the layers of paper. Seal with oil or varnish...we used Mod Podge for this in the 70s, but who knows what is available now.
Cut the tops and bottoms off olive oil or graphic covered tomato cans. Open and flatten them and tack to the walls. Use the round tops of cans to make fish-scale shingles.
Soak off the labels of wine bottles or graphic shipping crates from wine companies. Glue them in overlapping or carefully laid out patterns.
Photocopy old prints and glue the photo copies on the walls.
Buy beautiful Japanese or other hand made paper and glue to the wall.
Cover plywood seams with varnished or painted half-round or Astagal molding. Or cover and glue on nice fabric or paper before attaching them.