The Multipliers rollout is part of the Generic material's parameters.
Multipliers
Mode – Specifies how textures and colors will be blended by the multipliers.
Multiply – The texture is blended with a black color.
Blend Amount – The user-specified color is used for blending
Color – Controls the intensity of the Diffuse color.
Reflection Color – Controls the intensity of the reflection color.
Reflection Glossiness – Controls the intensity of the reflection sharpness.
Refraction Color – Controls the intensity of the refraction color.
IOR – Controls the intensity of the Index of Refraction value when calculating refraction.
Refraction Glossiness – Controls the intensity of the refraction sharpness.
Opacity – Controls the intensity of the overall material Opacity.
