Combine Color Node

The Combine Color Node combines an image from its composite color channels. The node can combine multiple Color Models depending on the Mode property.

Inputs

The outputs of this node depends on the Mode property (see below).

Alpha

The color channel that is responsible for the image’s transparency.

Properties

Mode

The color model to output.

• RGB:

  Combine the three inputs: Red, Green, and Blue color channels into a single image.

  HSV:

  Combine the three inputs: Hue, Saturation, and Value color channels into a single image.

  HSL:

  Combine the three inputs: Hue, Saturation, and Lightness color channels into a single image.

  YCbCrA:

  Combine the three inputs: Luminance, Chrominance Blue, and Chrominance Red color channels into a single image.

  • Color Space

    ITU 601, ITU 709, JPEG

  YUV:

  Combine the three inputs: Luminance, U chrominance, and V chrominance color channels into a single image.

Output

Image

Standard image output.

Examples

Blur Alpha

An example of blurring the alpha channel.

In this first example, we take the Alpha channel and blur it, and then combine it back with the colors. When placed in a scene, the edges of it will blend in, instead of having a hard edge. This is almost like Anti-Aliasing but in a three-dimensional sense. Use this node setup, when adding CG elements to live action to remove any hard edges. Animating this effect on a broader scale will make the object appear to “phase” in and out, as an “out-of-phase” time-traveling sync effect.

Increase Luminance

An example of the scaling the Luminance channel.

This example has a Math (Multiply) node increasing the luminance channel (Y) of the image to make it brighter.

Tip

If running these channels through a Color Ramp node to adjust value, use the Cardinal scale for accurate representation. Using the Exponential scale on the luminance channel gives a high-contrast effect.