"Everything has fresnel!"

[jasonhuang1115]

Ekenryd,

If I understand the curve correctly, toward the left (X-axis) is getting closer to the glancing angle and the higher the Y-axis the higher reflective. I did two test renders shown in below with a reverse node inserted. A solid blue is specified as the environment color.
lower reflectivity when faced dead-on.

higher reflectivity when faced dead-on.

[Ekenryd]

I don't know if I'm tired and missing something but I get the same result without the reverse-node. Leftmost on X is 0* for me, see screenshot.

[jasonhuang1115]

My bad Ekenryd. I plugged the remap node into the fresnel IOR of the VRay Mtl, instead of the Reflection Amount (assuming this is where you plugged the remap node to?). Thank you for the screen shot.

[bigbossfr]

http://refractiveindex.info/?group=METALS&material=Gold

Now if i understand, we must to recreate the same curve as the "Reflection calculator", "Direction in" ?

[Dariusz Makowski (Dadal)]

http://refractiveindex.info/?group=METALS&material=Gold

Now if i understand, we must to recreate the same curve as the "Reflection calculator", "Direction in" ?

Heya

Its something I ask vlado before some time a go...

We need to find out vray wavelenght at which its calculating its physics as far as I remember. And from that number we pick index (n is for IOR, k is for exstinction if I remember correctly) Not sure if this web will give us R G B IOR values per material...