On my account I have searched far and deep and never have I seen anything like this! On my adventure to explore every inch of the planet and grab all of the researchable things on the surface, I fell into a cave and almost died. I looked around to find a way out when I saw it, THE ZEBRA BALL! (All hail!) The Zebra Ball is a black and white glowing sphere that devs use to test lighting, shading, and textures. It is rare.