rainbow creation

how to create a rainbow . I want to create a rain bow at the water fall how to do it in unity. as i am new to unity

Maybe this is a better question for the forums?

What do you want it to look like? I would think you create it as a transparent PNG in photoshop or whatever and paste it on a Plane object with a Transparent shader.

But you could model it. You could make it from particles. There’s probably lots of ways to do it.

But really, since rainbows IRL ‘billboard’ to the viewer, go with my first suggestion, and use a billboard script on it like unifycommunity.com