Clip aX+b

Clip is probably the filter you'll use most. It's a contrast filter. The a variable controls the contrast and b controls the overall brightness.

For a low contrast effect make the wave in the graph smaller. Decrease the value of a to reduce the size of the wave and increase b to move the wave up.

Using this wave, all the values will be expressed as mid-gray. For a high contrast effect, adjust the wave so that it hits both the top and bottom edges of the preview.

Increase the value of a and make b negative to move the curve down.

To invert the colors in your noise, make a negative and increase b.

In these examples, different levels of Clip were applied to Linear Sine noise. The black and white versions show the contrast/brightness changes when Color is disabled.

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