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

comic dot bitmap texture background noise halftone grain pixel grid vintage grit speckle cartoon overlay grunge retro duotone manga effect digital poster old semitone spot sand dust snow pattern grainy rough vector gravel rust bg dirt paper book backdrop distressed particles cover wallpaper gritty stain rugged raggy dotted urban