Page 208 - ProShow Producer 9 Final Manual

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Thankfully there’s a set methodology you can use to get solid results. You
don’t even need to know exactly how the sliders work.

Here’s how you go about it:
1. Begin at the top of the sliders, with Hue Threshold, and adjust the
slider slowly to the right while looking at your image in the
Preview. Adjust the slider to the right as far as you can without
causing regions you don’t want to alter to become transparent.
2. Begin moving the Hue Drop Off slider to the right in the same
way once you’ve adjusted Hue Threshold as much as you can.
3. Continue in this manner to the bottom of the sliders.

By the time you reach the last slider you should have solid results with your
selected color becoming transparent. If you don’t, go back to the top slider
and start the adjustments again from where you just set them.

If you get to the bottom of the sliders and still don’t have the results you’re
looking for, try picking a different key color.

If you still can’t get the transparency to work just right you may be using an
image that isn’t well suited to Chroma Key. It doesn’t work equally with all
images.