User guide

KeylightThe Foundry
TUTORIAL
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Tutorial 3: Extreme Blue Spill
4. Alter the Screen Balance from 95 to 0 as shown in Figure 72. This step is
a bit subjective, but improves the blue spill.
Figure 72. Adjust the Screen Balance
5. Now let’s try and get rid of that blue spill. Increase the Despill Bias to 40.
When you do this the image and the screen colour will have the blue
component scaled up before the key is pulled so that more blue is
removed. You will have noticed that the foreground has gone quite
transparent. This can be compensated for by dropping the Alpha Bias. Un
check the gang button and try setting it to 30.
Figure 73. Despill and Alpha Bias.
6. You will notice that Miranda Richardson’s face now has a number of
highlights, due to the transparency, that we should fix. The best way to
do this is by pulling an inside matte. Set the Softness to 20 and Shrink to
-5.