The Speckle texture is a procedural texture that produces a contrasted speckled noise type effect that looks partly smokey in nature. Both of its two color channels can be connected to texture maps if required.

Color A – Controls the darker color. This channel can also be connected to a texture map. 

Color B – Controls the lighter color. This channel can also be connected to a texture map. 

Size – Controls the scale of the procedural texture produced.

Color Manipulation

Invert Texture – Inverts the RGB texture values.

Alptha from Intensity – Uses the texture RGB intensity/luminance as alpha channel.

Color Gain – Corrects the color of the texture by multiplying the the RGB color values in the texture with the RGB color values specified here. When a texture is selected, it overrides the color as long as the texture checkbox is enabled. 

Color Offset – Corrects the color of the texture by adding the RGB color values specified here to the RGB color values in the texture. When a texture is selected, it overrides the color as long as the texture checkbox is enabled. 

Default Color – Specifies a default color used for polygons with no valid UVs. In case the map is not tiled, specifies a default color that is used outside the texture square.  When a texture is selected, it overrides the color as long as the texture checkbox is enabled.

Mode – Specifies the multiplication mode of the colors. 

Multiply – Multiplies the RGB numbers for each pixel of the top layer with the RGB number of the corresponding pixel from the bottom layer. The result is a darker picture. The color used for blending is black.
Blend Amount–  Takes each pixel from the top layer if present. Otherwise the bottom layer is used. The color used for blending is the one specified in the color slot.

Color A – Blends between a color and a texture, if specified.

Color B – Blends between a color and a texture, if specified.