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Re: graduated effects from a feathered selection

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Mylenium
Re: graduated effects from a feathered selection
on Jan 16, 2007 at 6:15:33 am

To control the size of the convolution kernel you have to use Compound Blur or similar third-party effects. Your assumption of Photoshop doing so is not correct. Even with a selection, all pixels are blurred uniformly. The difference is in how both programs treat Alpha information. AE works with straight Alphas internally all the time whereas PS uses a different scheme. As you may come to realize, blurring pixels that were "transparent" to begin with yields different results than blurring a fully opaque pixel and re-introducing a blurred Alpha (as AE does things in simple terms). If you will, in AE Alpah calculations are decoupled from RGB calculations.

Mylenium

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