Graphics Programs Reference
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(the trigger was pulled in a previous shot). The color of the bullet is wrong, and it
should start darker, as if it's inside the barrel. Let's make this happen.
5. Insert a Grade node after Read3.
Because this is a premultiplied image, you need to unpremultiply it. You can do
that as you did in Chapter 2 . However, you can also do it inside the Grade node
(or indeed any color correction node).
6. At the bottom of Grade1's Properties panel, choose Rgba.alpha from the
(Un)premult By drop-down menu.
This ensures that the RGB channels are divided by the alpha and then multiplied
again after the color correction.
7. Gotoframe20intheTimebar.It'sagoodframetoseethecolorcorrectionneeded
( FIGURE 8.41 ) .
Figure 8.41. The difference in color is apparent.
You can see here that the metal of the gun and the metal of the bullet have very
differentcolors.Althoughtheyaren'tnecessarilysupposedtobethesamekindof
metal,itlooksatthemomentasifthereisdifferent-coloredlightshiningonthem,
and their contrast is very different as well. You will use the Gamma property to
bring down the midtones and create more contrast with the bright highlights that
are already there and use the Lift property to color the shadows to the same kind
of red you can find in the background image.
8. Adjust the Gamma and Lift to color correct the bullet so it looks better. I ended
up with Lift: 0.035, 0.005, 0.005 and Gamma: 0.54, 0.72, 0.54.
 
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