Most numeric V-Ray parameters come with a slider to make fine-tuning easier. Each slider is set to a default range of recommended or commonly used values.
If a value above that range is used the slider adapts by increasing its range accordingly (2x the input value) to maintain usability.
If a value below the current slider range is used, the slider again adjusts its range by shrinking it to twice the amount of the input value.
Note that that the slider range does not indicate the parameter's total minimum and maximum input values.
The absolute minimum and maximum values of each parameter can be found by hovering over its spinbox.
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Add Attribute
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Add Attribute
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An Add Attribute button is provided for some V-Ray materials.
Attributes allow you to further control the appearance of the object through the material. They are generally separated into two groups - the first group adds effects to the appearance of the object, such as bump, contours, etc. The second group affects the render properties of the object - visibility, transparency, appearance in reflection/refraction channels and more.
You can add only one attribute of a kind to the material.
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Holding down Ctrl (or Cmd on macOS) while having the Add Attribute menu open, allows selecting multiple entries without closing the dropdown.
