User guide

125

Creating a luma key effect

To create a luma key effect, select either Key Black or Key White from the

Effect List. This lets you key on black or white in your foreground image. If you

want to customize your luma key effect

, click the Custom Luma Keys tab or the

Luma Key track:

By selecting

Simple edit, all settings are applied for the duration of your clip.

This means that you’ll have only one keyframe at the first frame of your clip. If

you want to change settings at different frames of the clip, you’ll have to clear

Simple edit

You can select luminance values on which to key by adjusting the

Low Clip and

High Clip

controls.You can also adjust the softness of your key with the Low

Gain

, High Gain, and Transparency controls. All these adjustments affect the

shape and size of the luminance selector (see Luma Plot on page 126) as follows:

Here’s an explanation of how to use each control:

HIGH GAIN

LOW GAIN

TRANS

LOW CLIP

HIGH CLIP