Houdini 12 Compositing
To do this...Use this operator
Constant color

Color COP

Linear and radial color gradients

Ramp COP

  • The color ramp can blend between any number of colors, and you can control blending speed between colors.

  • The ramp can wrap around to create a continuous loop.

  • You can cycle the colors in the ramp.

4-corner ramp

Corner Ramp COP

  • You control the color and strength at each corner.

  • You can add additional points and move corners to produce a more general contour image.

Noise

See how to add noise.

Quickly generate imagery with a lot of colors (useful for experimenting with or testing color-related networks)

Colorwheel COP