User guide

KeylightThe Foundry
TUTORIAL
45
Tutorial 5: Inside Mattes
Tutorial 5: Inside
Mattes
Using the blue screen test card image you will learn how to:
• Process the Screen Matte.
• Use Colour Differentiation to pick a very specific inside matte.
• Use the Replace Method to put back keyed out colours.
The clips you will need for this task are called TestCard.tif and ColourGrid.tif
1. Load the pictures TestCard.tif (Figure 81) and ColourGrid.tif and put
them into the timeline layering the blue screen over the colour grid.
Figure 81. Test Card.
2. Apply Keylight to the blue screen layer and pick the blue from the image.
Keylight will create a matte and despill the foreground as shown in
Figure 82.
Figure 82. Basic Key.