Material for Rainbow around Torus Is there a convenient way to make a rainbow material that varies smoothly along a torus? In the image below, I made a new emission material for each of the 32 segments along the major axis, changing the HSV hue by 1/32 each time. Clearly, you can still see bands of color; plus, it's labor intensive to make all of these materials, and challenging to edit afterwards.

Ultimately, I'd like to have the material's color spin around the object.
Just to add to Moonboot's nice answer.
ColorRamp can actually create the whole HSV spectrum for you :).

Set both sliders to Red
Set ColorRamp to HSV &gt; Far
Done