The shaders were made with AmplifyShader, which is my favorite nodal shader creation tool. :D
And they don't use polar coordinates, but simple refraction/distortion, and also a bit of UV distortion with a lot of panning textures~!
oooh I see, I've heard about it. I see people porting shaders from there to shadergraph still. It sounds pretty much the same.
How did you manage to get the swirl effect then? If not with polar coordinates.
And once again props to the team!!