An arrangement of spheres, which seems to construct a line. This line is a vertical one which hits the image center. Created with mandelbulber2. All these lines create a grid.
<a href="//commons.wikimedia.org/wiki/User:PantheraLeo1359531" title="User:PantheraLeo1359531">PantheraLeo1359531</a>
<span class="int-own-work" lang="en">Own work</span>