halftone grungy background. fading grain gritty textured wallpaper. black and white comic noise grit surface. pixelated

dot background gradient grunge halftone comic noise pattern manga grid overlay wave duotone cartoon texture gritty semitone retro grit old book speckle anime sand vector subtle dust bg rough dirt snow fade rust distress wavy dirty gravel grungy particles grime messy granules aged bitmap pixel grain bw bit 8