mib_color_spread

Category: mental ray > Texture

Shader Family: Texture

Output: Color

This shader fans out one color input to up to 8 color outputs (the exact number is determined by the num parameter). Each output is equal to the corresponding input, multiplied by a weight, with a given conversion.

The equations are:

Mode	Operation	Calculation
0	Weighted Color	R = w . A
1	Grayscale Color from Alpha	R_rgba = w . A_a
2	Grayscale Color from Average Intensity	R_rgba = w . (A_r + A_g + A_b) / 3
3	Grayscale Color from Weighted Intensity	R_rgba = w . (0.299 . A_r + 0.587 . A_g + 0.114 . A_b)
4	Grayscale Color from Red Component	R_rgba = w . A_r

Where:

R is the current (one of up to eight) result

w is the current weight

mode is the current conversion

A is the input color shared by all outputs

Mode 4 is intended for converting a scalar to a grayscale color.

Name	The name of the shader node displayed in the render tree. Enter any name you like, or leave the default.
input	The color input.
num	The number of valid inputs to compute. The minimum is 1 and the maximum is 8.
mode_*	The modes as described in the table above.
weight_*	The weights w as described in the table above.

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