Inverting Fresnel

I have a question about the Fresnel value in the material panel, under the ‘mirror’ section. Normally, the Fresnel effect controls how reflective the material is depending on the angle between the surface and the viewing direction. Generally, the larger the angle the more reflective a material becomes.

My question is, how can I invert this? I want it to become more reflective the smaller the angle. I have tried entering a negative number but that doesn’t work.


In BI, the fresnal is based on how it works in real life and thus you would not be able to reverse it within the material panels itself.

You would instead need to create a separate reflective and transparent material and blend them together using the material nodes, using the output from the geometry node to blend them according to the angle of the normal towards the camera.

Thanks. I will certainly try that.