User Manual

Example 1: Invert
If you want to do a simple invert or negative of the color values, but leave the Alpha channel
untouched, the matrix would look like this:
Observe the fact that we have to add 1 to each channel to push the inverted values back into
the positive numbers.
Let’s follow this example step by step by viewing the waveform of a 32-bit grayscale gradient.
1 The original grayscale.
2 RGB set to -1. The values get inverted but fall below 0.
Chapter – 85 Color Nodes 1876