And the LORD said to Moses, "Make a fiery serpent, and set it on a pole; and every one who is bitten, when he sees it, shall live." So Moses made a bronze serpent... Numbers 21:8-9 ...

These images still aren't perfect renderings, but they're pretty close. How to fix it: You can't, but on the plus side, you're a lot more likely to avoid lawsuits for copyright infringement.