2017

TIP You can adjust the mix at any time as you develop the key.
6 Gesturally refine the matte. In the image window, click an area of the matte that you want to
refine—only those parameters that pertain to the area you click appear. Parameters are displayed in
order of importance, from top to bottom (those that are brightest and at the top have the greatest effect
on the image). You can then modify a parameter by dragging its highlighted slider.
■ To add softness, drag a slider to the right.
■ To remove softness, drag a slider to the left.
The red indicator shows the original value and the yellow indicator shows the current value.
7 To modify more than one parameter, move the mouse between the parameters to highlight a parameter,
or drag the pen vertically. When you highlight the parameter you want to adjust, drag the slider.
TIP If you do not like the result, you can click Undo to reset parameters directly after you complete the
operation. There is only one level of undo in the Keyer menu.
8 When you are finished modifying the displayed parameters, click another area of the image without
highlighting a parameter to hide them. Alternatively, you can press any key, such as spacebar or Esc.
The parameters are no longer displayed.
9 Repeat steps 6 to 8 in other parts of the matte to further refine it. Only the parameters that apply to
the problem area will appear.
10 To scroll through the image and display the pertinent parameters, Option-drag the image without
clicking it. The parameters update as you drag. You can then modify the displayed parameters by
clicking the image and dragging the highlighted slider.
NOTE To reset matte parameters, click the Reset button, next to the sampling box. All matte parameters are reset,
except the Mix field and the key colour.
After you have generated your matte, perform basic colour spill removal (page 688).
Basic Colour Spill Removal
After you
create and refine your matte (page 687) for the key, you can perform basic colour spill removal by
gesturally modifying the Spill parameters.
To gesturally remove colour spill:
1 In the Master Keyer menu, select Spill from the Sampling box.
2 Set the view to Result view.
688 | Chapter 16 Chroma Keying and Working with Green Screens