This tool allows you to preview RPManager passes, much like doing a max preview to AVI but with more options - you can preview to frames, control the location, preview all your passes as a sequence, control backgrounds, and generate alphas.
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{{http://www.rpmanager.com/wiki/images/RPMPreviewDialog.gif}}
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Once you've setup your parameters, use the buttons at the bottom to start the previewing. (The screen will be reorganised somewhat while the capturing is taking place).