Those lines are showing up because the old algorithm can&#x27;t produce all possible values in the 0-1 range. 32 bits of internal state simply aren&#x27;t enough for that.<p>The problem is highlighted by the images in this article:<p><a href="http:&#x2F;&#x2F;jandemooij.nl&#x2F;blog&#x2F;2015&#x2F;11&#x2F;27&#x2F;math-random-and-32-bit-precision&#x2F;" rel="nofollow">http:&#x2F;&#x2F;jandemooij.nl&#x2F;blog&#x2F;2015&#x2F;11&#x2F;27&#x2F;math-random-and-32-bit-...</a>