Snakebird rainbow circle effect

Hi everyone,

I was wanting to implement something similar to the effect in snakebird where the rainbow circle warps. I remember the developers had a blog post on how they did it, but their site seems to be down.

Has anyone got any tips on how to achieve the warping effect. I remember they used Perlin noise but don’t remember much more.

Thanks, Oliver

Edited by Oliver Marsh on Reason: Initial post
https://unitylist.com/p/me8/Unity-2d-Gaol-Effect Found this example which solves it 👌