Creating a Bilnear Ramp

The Bilinear Ramp tool lets you create images with a variety of properties and in several formats. The Bilinear Ramp tool is comprised of five sets of color channel value fields that let you to generate a multi-color image based on RGBA values. One set of values is for generating the fill color, and four sets are for generating start and end ramped colors residing in a four-quadrant region of definition (ROD). The fill color is defined as those pixels residing outside the ROD. Two other controls let you to position the X and Y axes of the ramps at any location in the image.

To create a bilinear ramped image:

1. Drag the Bilinear Ramp tool from the Tools tab to the dependency graph in the Schematic view and attach it to the Output node.
   
2. Apply image properties—see Setting Image Generation Properties and Formats.
3. Adjust the color values in the Fill, Lower Left, Lower Right, Upper Left, and Upper Right.
4. Modify the location and direction of the X and Y ramps.
   

NoteYou can also manipulate the linear ramp by clicking and dragging the horizontal and vertical bars.

You can also type values directly into the value fields and press Enter.

The Bilinear Ramp tool's Fill, Lower Right, Lower Left, Upper Right, Upper Left, and Center X and Center Y parameters are animatable by setting keyframes or using expressions—see Setting Keys Manually and Validating and Applying the Expression String.

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