Pure physically correct light interference, with three materials (two metals, glass and a down jacket fabric material) EEVEE and Cycles supported

Update 1.1 : Correct direction of color decay

All of these scenes included

You can easily adjust the light interpolation, number of waves, strength and phase you need

Also in the collection there is a pure interference material that gives only color, you can connect your custom normal maps to the input and adjust it at your discretion