| Render Tree Usage
Category: Processing > Color Channels
Shader Family: Texture
Output: Color
Extracts the alpha channel from a color input. If the input has no Alpha channel, the shader converts the input color to an
RGBA grayscale. The returned R, G, B, and A channels will all have the same value.
NoteEven if the input color has an empty Alpha channel, the shader will use it, regardless of content. If you wish to convert
the input to an Alpha channel, make sure the image is stripped of the blank Alpha channel.
Tips: Use this converter whenever you need to extract the alpha channel. For example, if you blend a surface with a transparency
ramp, you can adjust the intensity of the ramp by adjusting the factor. This factor can also be animated. Values less than
1 turn black area into gray, and values over 1 change the gray to black
|
|
The shader's name. Enter any name you like, or leave the default.
|
|
|
Specifies the input color used to compute a grayscale intensity level.
|
|
|
The intensity to output. Default value is 1. Be sure to give the Factor parameter a value, otherwise the node will simply
return black (no value) as output.
|
Render Tree Usage
You can use this node if you wish to isolate an image clip's alpha channel for use elsewhere (like driving a bump map, for
example).
