halftone wavy grunge gradient background. faded grain gritty wallpaper. black white comic noise grit surface. pixelated

dot halftone gradient grunge comic noise bitmap pixel grain pattern manga grid overlay wave duotone cartoon texture gritty semitone retro grit speckle anime sand vector subtle vintage dust bg rough dirt snow grainy print fade rust distress dirty gravel grungy particles grime messy granules wavy back ground half tone