Reply To: Why the value of blue IOR is higher than the red hue?

Hi Juan,

you were correct both times, the IOR in blue is higher than in red, which is the same as the IOR is less in red than in blue…

The purplish color is mainly due to two things, the three IORs shouldn’t in reality be equidistant, as they are in this setup (you add and subtract the same value)…and you don’t have enough Samples in your screenshot…

(not very visible in this compressed image, but less Samples give more noise and more purple):

I am also not entirely sure if all your Normals are correct…(they might be though)