Learn how to alter the shape and intensity of reflections with Index of Refraction.
- [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 increase the IOR to a value of two,…
AuthorAaron F. Ross
- Streamlining material editor workflow
- Managing assets
- Referencing materials with XRefs
- Rendering the Physical Material
- Controlling highlights with Roughness
- Directing reflections and refractions
- Simulating translucency and scattering
- Building a shading network
- Combining and color correcting maps
- Baking maps with Render to Texture
- Procedural mapping
- Using relief maps: bump, normal, and displacement
Skill Level Advanced
3ds Max 2018: Mastering UVW Mappingwith Joel Bradley2h 31m Intermediate
3ds Max 2019 Essential Trainingwith Aaron F. Ross10h 39m Intermediate
1. Material Editor Tips and Tricks
2. Hard Surface Materials
3. Ray Tracing Techniques
4. Building Shading Networks
5. Advanced Mapping
Mapping a gradient ramp6m 31s
Next steps1m 21s
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