= Add noise =

table>>
    tr>>
        th>> To do this...
        th>> Use this operator
    tr>>
        td>> Noise
        td>>
            [Noise COP|Node:cop2/noise]

            * Can create different types of noise, including completely
              random pixels, and more continuous noise like Perline,
              Sparse, and Alligator.

            * Useful for adding variation to mattes, either by
              multiplying the matte, or adding to/screening the matte.

    tr>>
        td>> Film grain
        td>>
            [Grain COP|Node:cop2/grain]