I have found an entity from the game Rooms: Low Detailed which has a rainbow effect that spins. It isn’t strictly one color unlike other rainbow effects, and it seems like an image is spinning inside the face that looks like it isn’t leaking out. How is this effect achieved? How would I recreate it?
Basically, he meant that if you want to have an interface with gradients, you can use the UIGradient component!
It allows you to customize colors, position, transparency, and how you want to be rotated, just as you wish to know in this topic. Here is the Creator Documentation explaining how it works with samples: