Heavy metal!

[alco3d]

I've tried to post this topic before, but something go wrong, and moderator didn't leave my post.
I try to make my topic more shortly, than it was.
Ok. Recently I wanted to make my own metal material with advanced material. I noticed i can make metal by two different ways:
1) Fresnel -off, IOR-1, Specular - grey
2) Fresnel-on, IOR-max,Specular white
I didn't hear about Fresnel before. It became interesting to me, which method i must choose. I spent all day for the theory of light and the Fresnel effect. Now i know second way is right and more accuracy. Now i know what Fresnel is and how it behaves on model. But somewhat seems to me so strange.  While i searched somethink for this question i found this..

How you can see, Fresnel effect becomes more and more appreciable, step by step. But after IOR= 2,2 happens strange. Increase IOR is increase of the Reflection???
Please help! Somebody explain to me physic of this effect!
Thanks all!

[thomasteger]

IOR determines how the light refracts on the surface. A higher IOR yields in more reflection.

That's why we made KeyShot. So you don't have to tweak all these parameters. Just pick the metal material and you are done!

[alco3d]

Thomas
Thank you for response. Not difficult just use standard material. But i want completely to realise this feature, to understand behavior of a light in the sphere and on a surface. Maybe someone have a link?