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Download SIGERTEXMAPS ComplexFresnel for 3ds Max 2013 - 2016

[ #3dsMax #Vray #Corona ]
Siger Studio has unveiled a free complex fresnel Texmap plugin for 3ds Max. It can be used to render materials with complex index of refraction (IOR): the regular material (for example V-Ray, Corona Renderer) can compute the Fresnel effect for dielectric materials like plastic based on the IOR of the material (n) – however metals have a more complicated Fresnel reflective curve that depends also on another parameter called extinction (k) coefficient: η = n + ik.
n and k determine the two characteristics of the Fresnel curve for a material: the reflectivity at normal incidence and how quickly it fades to white at grazing angles.

The Texmap plugin can be used as a reflection color map in a material with the Fresnel option of the material turned off (this plugin does its own Fresnel calculations).


n – the n (IOR) values for the Red/Green/Blue wavelengths (0.650, 0.510 and 0.475 μm).
k – the k (Extinction coefficient) values for the Red/Green/Blue wavelengths.

Presets – some presets for quick start (to enter other parameters (n, k) values it is necessary to select preset Custom).

If you need a bit different color (f. e. for various alloys), use a Color Adjustment parameters and adjust the Gamma, Hue, Saturation values. This way you still have the correct Fresnel curve and are just making color changes.
Gamma – specifies the gamma correction value.
Hue Shift – lets you change colors using a standard Hue spectrum. Range = -180…180.
Saturation – the intensity or purity of the colors. Lowering the Saturation value removes color, causing the color to tend toward grayscale, while raising it intensifies the color. Range = -100…100.

How to get values

The site has the measured n and k values for many metals like Copper, Gold, Iron etc.


Download SIGERTEXMAPS ComplexFresnel for 3ds Max 2013 - 2016 64 bit here
Also check some SIGERTEXMAPS ComplexFresnel examples by Autodesk Master - Jeff Patton, rendered with Corona Renderer here

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Download SIGERTEXMAPS ComplexFresnel for 3ds Max 2013 - 2016 Reviewed by CGRecord Team on 08:27 Rating: 5
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