optical illusion of twisting dark gray spiral from rhombuses

abstract angle backdrop background black circle contemporary curve dark depth descent design dimension distortion down drain draining edge fractal funnel generated geometric geometry gray grey hall illusion illustration infiniti line metal monochrome optical pattern perspective repetition rhomb rotation round rounded shade shape simplicity spiral square step strip striped swirl torsion twirl twist void vortex wallpaper warp web whirl whirlpool white winding