halftone grungy wood texture. grunge grit bark background. black dotted wooden wallpaper. retro comic pixelated backdrop

comic wood dot bitmap bark texture wooden background noise halftone grain pixel vintage grit speckle cartoon overlay grunge retro duotone manga effect digital poster old semitone grid spot sand dust snow pattern grainy rough vector bg dirt paper book backdrop grungy distressed cover screen bw white gritty halfton dotted