halftone gritty noise texture. grunge grit halftone background. black and white sand noise wallpaper. retro comic

comic dot bitmap texture 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 gravel rust bg dirt paper book backdrop grungy distressed particles cover dotted screen bw white gritty halfton