Noise is a very important filter for the computer artist and photo retoucher. . Their effects can be seen in the filter preview window. The grain of color film is multi-color.
Selective hue is available in some third party filters and can be used for any of the above.
Gaussian gives a more clumped appearance that is more visible and more closely resembles the clumping found in film grain. Try various blur filters, including Gaussian, to soften noise. . Save a copy of the base image without any noise. 2 Make two layer copies of the base image. 3 Activate the top layer copy to apply noise to it. .