Reproduce fresnel falloff curve as in 3Dmax

[Jeffrey Levenstone]

Hello Eeveryone,

I found this https://helloluxx.com/tutorials/cinema4d-2/cinema4d-materials/curve-fresnel/

Greetings,
Jeffrey

[Emir Bojorquez]

If you put your fresnel inside a Filter, you can use the Gradiantion Curves.

Good Luck

Imagination is the best tool…

[Jeffrey Levenstone]

Hello Emir,

I am a bit of a newbie. How do you do that?
Couldn’t quite grasp what you meant by that.

Greetings,
Jeffrey Levenstone

[Emir Bojorquez]

Go to your Reflection Channel >>Texture>>Filter. then click over the black rectangle to go inside the filter. inside this go to Texture >>Fresnel, now move down and you will See 4 Curves inside the Filter (RGB, R,G and B).

Good Luck

Imagination is the best tool…

[Adam Trachtenberg]

Great use of the Filter shader. Probably not necessary, but I did a quick video demonstration of the technique you suggested:

https://www.youtube.com/watch?v=QZOSvB15LYA&feature=youtu.be

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[Darby Edelen]

Something to keep in mind if you use the Filter is that the default interpolation mode of the all gradients in C4D is Smooth Knot.

If you’re attempting to remap the values using something like Filter the you’ll want to start with a Linear gradient instead, otherwise the values you enter in the curves of the filter will not correspond directly/linearly to the fresnel falloff.

You can change the gradient interpolation by clicking on the small arrow at the left of the gradient, this gives you more options for the gradient including interpolation.

Darby Edelen

[Jeffrey Levenstone]

Thank you Darby.

It is a really nice thing when you finally start to grasp stuff in an app like this.
Been at it for a year now, just learning the basics and understanding the foundation and the vocabulary
of 3D.

[Jeffrey Levenstone]

Thank you for the link Adam. The video made it alot clearer.

[Jeffrey Levenstone]

Thank you for this explanation, there are so many option that you can use to get there.

One other question, how do I make the preview ball only show black and no image reflected in it?
I find the image in the ball to be distracting.

[Jeffrey Levenstone]

Are you talking from the point of view of the VrayAnvanced shader (Vray4C4D 1.9)?

And does the gradient also have to be reversed? And does the native or VrayAdvanceShader make a difference
once I am using this method?