The Reflection color parameter

The Reflection glossiness parameter

The Use Fresnel option

The Anisotropy parameter

The Anisotropy rotation parameter

The Refraction color parameter

The Refraction glossiness parameter

The Refraction IOR parameter

The Fog color parameter

The Fog multiplier parameter

The BRDF type

 

The Reflection color parameter

This example demonstrates how the Reflection color parameter controls the reflectivity of the material. Note that this color also acts as a filter for the diffuse color (e.g. stronger reflections dim the diffuse component).

 

[Black reflection] [Medium grey reflection] [white reflection]
Reflection color is black (0, 0, 0) Reflection color is medium grey (128, 128, 128) Reflection color is white (255, 255, 255)

The Reflection glossiness parameter

This example demonstrates how the Reflection glossiness and Hilight glossiness parameters control the hilights and reflection blurriness of the material. The Reflection Color is white and the Use Fresnel box is checked.

 

[Glossiness 1.0]
[Glossiness 0.8]
[Glossiness 0.6]
Reflection/Hilight Glossiness is 1.0
(perfect mirror reflections)
Reflection/Hilight glossiness is 0.8 Reflection/Hilight glossiness is 0.6

The Use Fresnel option

This example demonstrates the effect of the Use Fresnel option. Note how the strength of the reflection varies with the IOR of the material. For this example, the Reflection color is pure white (255, 255, 255).

 

[Fresnel reflection off]
[Fresnel reflection on, IOR 1.3]
[Fresnel reflection on, IOR 2.0]
[Fresnel reflection on, IOR 10]
Fresnel is off Fresnel is on, IOR is 1.3 Fresnel is on, IOR is 2.0 Fresnel is on, IOR is 10.0

The Anisotropy parameter

This example demonstrates the effect of the Anisotropy parameter. Note how the different values stretch the reflections horizontally or vertically.

 

[Anisotropy -0.9] [Anisotropy -0.45] [Anisotropy 0.0] [Anisotropy 0.45] [Anisotropy 0.9]
Anisotropy is -0.9 Anisotropy is -0.45 Anisotropy is 0.0 (no anisotropy) Anisotropy is 0.45 Anisotropy is 0.9

The Anisotropy rotation parameter

This example demonstrates the effect of the Anisotropy rotation parameter. For all the images in this example, the Anisotropy parameter itself is -0.95.

 

[Anisotropy rotation 0.0] [Anisotropy rotation is 45] [Anisotropy rotation is 90] [Anisotropy rotation is 135] [Mapped anisotropy rotation]
Anisotropy rotation is 0.0 degrees Anisotropy rotation is 45.0 degrees Anisotropy rotation is 90.0 degrees Anisotropy rotation is 135.0 degrees Bitmapped Anisotropy rotation (map in the upper-right corner)

The Refraction color parameter

This example demonstrates the effect of the Refraction color parameter to produce glass materials. For the images in this example, the material is with a grey Diffuse color, white Reflection color and Fresnel option on.

 

[Refraction color is black] [Refraction color is grey] [Refraction color is white]
Refraction color is black (0, 0, 0) (no refraction) Refraction color is light grey (192, 192, 192) Refraction color is white (255, 255, 255)

The Refraction glossiness parameter

This example demonstrates the effect of the Refraction glossiness parameter. Note how lower Refraction glossiness values blur the refractions and cause the material to appear as frosted glass.

 

[Refraction glossiness 1.0] [Refraction glossiness 0.9] [Refraction glossiness 0.8]
Refraction glossiness is 1.0 Refraction glossiness is 0.9 Refraction glossiness is 0.8

The Refraction IOR parameter

This example demonstrates the effect of the Refraction IOR parameter. Note how light bends more as the IOR deviates from 1.0. The case when the index of refraction (IOR) is 1.0 produces a transparent object. Note however, that in the case of transparent objects, it might be better to assign an opacity map to the material, rather than use refraction.

 

[IOR 0.8] [IOR 1.0] [IOR 1.3] [IOR 1.8]
Refraction IOR is 0.8 Refraction IOR is 1.0 Refraction IOR is 1.3 Refraction IOR is 1.8

The Fog color parameter

This example demonstrates the effect of the Fog color parameter. Notice how the thick areas of the object are darker in the two images on the right because of the light absorption of the fog.

 

[Fog is white] [Fog is grey] [Fog is green]
Fog color is white (255, 255, 255) (no light absorption) Fog color is grey (128, 128, 128) Fog color is green (116, 190, 102)

The Fog multiplier parameter

This example demonstrates the effect of the Fog multiplier parameter. Smaller values cause less light absorption because of the fog; while higher values increase the absorption effect.

 

[Fog multiplier 0.5] [Fog multiplier 1.0] [Fog multiplier 1.5]
Fog multiplier is 0.5 Fog multiplier is 1.0 Fog multiplier is 1.5

The BRDF type

This example demonstrates the differences between the BRDFs available in V-Ray. Note the different hilights produced by the different BRDFs.

 

[Phong BRDF] [Blinn BRDF] [Ward BRDF]
BRDF type is Phong BRDF type is Blinn BRDF type is Ward