My mom used to use textured wallpapers in her art work all the time. She used to pick up old wallpaper books and discontinued wallpaper rolls from decorating shops and do-it-yourself sections of hardware stores and such all the time. She used to grab some really wild ones from yards sales and stuff too.
I used to make my own textured paper by embossing scrapbook papers with stamps and embossing powder. I'd pick one color of powder, a bunch of papers that I thought would look good with the color and just stamp and emboss myself silly. I used to have a woman that made cards who would actually have me make some for her for card making. I was doing scrapbook collage (didn't use any wet glues. paints, or glazes) only stamp pads to add to my decorated papers. I also found finding plain white textured papers in the scrapbook section fun to color with stamp pads and embossing powder too. The batches were small, but lots of fun.
