Artangel: Mixed media crumpled tissue technique - tutorial - basically, glue tissue paper over a canvas, let dry. Paint, let dry, then rub oil pastel or crayon over the surface to highlight the texture.
Good tutorials on creating wonderful texture and color. Yours Artfully: Liquid Leaf Luciousness In More Detail. Not sure why anyone would put this much work into a gift tag, but it would be the start to great art work.