How can I have a part of an object be an emission shader and then have the emission move up the object ans start at the bottom again?
So for instance: I have a cylinder that has a normal principled shader and a ring that is an emission shader. I then want to have that emission part move up and down the cylinder. So that the glowing part moves up and down the cylinder. Or have it start at the bottom, move up and start at the bottom again. I am assuming I could just make a separate object with an emission shader that moves up and down the cylinder. But I would love to learn how to do it in 1 shader. If possible at all.