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

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