Matching Grain

When you add grain to one image (the target image), you can sample grain from another image (the source image) to make the grain throughout the clips in a composite the same.

Note: Since the Match Grain picker can be used with built-in granularity curves, some steps in this process apply to using the Kodak emulsion and B/W options. See "Using Built-In Granularity Curves" for steps specific to these Film Stock options.

There are three ways to set up viewports or images to sample grain from another image:

• When the current operator is the composite and the source image is in the composite, the viewport can show both the target and source images (due to a matte on the front image or the arrangement of the layers).
• If the source image is not visible (or it is not in the composite), you can use the Compare tool and sample from another operator in the workspace. For example, you can sample from a shot in another branch after you set up the viewport to show a region of that image.
• Since the Match Grain picker can sample from any viewport, you can set up another viewport to show the source image.

This section explains the process for re-graining a clip using the Custom option, as outlined in the following procedure.

To sample using the Match Grain picker:

1. Apply the Add Grain operator to the target image (or clip).

See Apply the Add Grain Operator.

2. Analyze the grain of the clip you want to match.

This is the step where you use the Match Grain picker. See Analyze the Grain.

3. Compare the grain that you want to match.

Show the composite in the viewport, set up a Compare region, or use two viewports. See Compare the Grain.

4. Adjust the grain color/intensity if necessary.

See Adjust the Luma of the Grain.

5. Adjust the grain size if necessary.

See Adjust the Grain Size.