You're not going to believe it but that crystal clear caterpillar you're looking at, is real. And it wasn't rendered at all. In fact, its a real life gummy worm, known as the Jewel Caterpillar.
The bug was photographed by scuba instructor and amateur photographer Gerardo Aizpuru, and the Jewel Caterpillar grows to over an inch in length and is a member of the moth species known as Acraga coa. It's mostly in camouflage, and uses mother nature's version of a cloaking device. The red polka dots inside it shows its clear spikes though, so its not exactly in the best of disguises.
The Jewel Caterpillar will eventually turn into a moth that looks like a tiny flying furry Irish Setter. Check it out below: