Lesson 9 Flashcards
You want to create a hole in a layer to reveal the layers underneath. You add a mask with the B-Spline tool, but instead of creating a hole in the layer, it restricts the layer’s visibility to the area inside the circle. How can you make it do the opposite?
In the HUD or the Mask pane of the Inspector, choose Subtract from the Mask Blend Mode pop-up menu, or click Invert in the Inspector.
What types of camera movements can you stabilize using the Stabilize behavior?
Position, Rotation, and Scale
When using the Match Move behavior to track the position of one layer to another, do you apply the behavior to the layer that will inherit the new movement or to the layer that has the movement you want?
The Match Move behavior is applied to the layer you want to
inherit the new movement.
How can you create a sharp corner in a B-Spline mask?
Command-drag the control point, (or Control-click the control point), and from the shortcut menu, choose Linear.
If the shades of the green or blue screen are not totally removed when you first apply the Keyer filter, how can you add additional shades?
In the Inspector, click the Sample Color button and drag a selection rectangle around the additional color shades you want to remove.
You are looking at a keyed shot and the foreground subject has some areas of green fringe around it. Which parameter of the Keyer filter do you adjust?
The Spill Level parameter
You’ve perfected the matte on your subject, but a white ring appears around the foreground subjects. Describe one of two approaches to remove the white ring.
Adjust the Shrink/Expand parameter to shrink the matte, or
adjust the White point handle in the Spill Contrast graph.
In what two areas can you find the Light Wrap parameters, and when would you adjust them in each location?
The Light Wrap parameters can be found in the Keyer filter or in the Blend Mode menu on the Properties pane. You would use the Light Wrap in the Blend Mode menu when you plan to color correct the foreground of the key. Otherwise you can use the Light Wrap setting in the Keyer.
How can you check the actual RGB values of an area in your clip?
Select the Color checkbox in Motion Preferences, and move the pointer over pixels in the image.
What does the Strength slider do in the Keyer filter?
The Strength slider adjusts the core transparency. When you reduce the slider value, you reduce the transparency by narrowing the range of green used to create the matte.
Option-BB
Option-BB = Choose the B-Spline Mask tool
