comic halftone wave background. dotted curved flow wallpaper. abstract fluid backdrop texture. black grit pop art swoosh

dot gradient bitmap halftone comic pattern texture noise manga background digital duotone fade grain grid wave pixel speckle tech bg spot overlay cartoon dust water wind back retro superhero rough distress vector ripple gravel messy granules black grunge anime swirl grainy swoosh squiggle grit gritty sand semitone dotted flow