From the course: 3ds Max 2019: Advanced Materials

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Using Index of Refraction (IOR) to control reflectance

Using Index of Refraction (IOR) to control reflectance - 3ds Max Tutorial

From the course: 3ds Max 2019: Advanced Materials

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Using Index of Refraction (IOR) to control reflectance

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- [Instructor] You probably know that index of refraction or IOR controls how light bends through a transparent medium. It's the density of the material. In the physical material in 3ds Max, we see in the Reflections section, there's an IOR parameter. That should be an indicator that index of refraction also affects reflections. And it is easiest to see if we turn the Metalness down to zero, although it will work in any mode. I'll set Metalness to zero, and we have an IOR at the default of 1.52, which is about the same as standard glass. We can increase or decrease the strength of the highlights by playing with this IOR parameter, and that in turn will affect this Advanced Reflectance Parameters section, which is defaulted to accept the value by IOR. So, as we change the IOR value, we will change the intensity of highlights either on a facing angle, meaning a polygon that's directly facing the camera or on edge, which are polygons that are facing 90 degrees away from the camera. I'll…

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