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Color overlay planes<br />
• Node colors displayed on surface are obtained by:<br />
1 st : mixing background planes<br />
2 nd : mixing foreground planes<br />
3 rd : layering mixed foreground atop mixed background plane<br />
When foreground colors overlap background colors, they either<br />
mask or get attenuated by the background’s brightness.<br />
7/2/2004 SSCC/NIMH 58
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