abstract art backdrop background blue concept creative decoration design elegant element geometric graphic illustration intricate modern ornate painting paper pattern retro seamless shapes texture tile vintage wallpaper appearance brown color colored colors colour coloured colours grain grained panel rough surface textured textures uneven varnish varnished wall wood wood-grain wooden exterior external pre-painting stained stains streaked streaks treatment water damage angles comfort gardening kneeling pad kneeling pad patterned red synthetic synthetic rubber thick