Hi,
Here are several more notes on current implementation of raster effects.
1. Terminology and hints. In some cases terminology used in effects coming from ImageMagick is not quite obvious. For instance, you might want to reread a course on math to understand what "Sigma" stands for in "Sharpen"/"Unsharp Mask" effects ;-) We might either rename some of the labels (not good for experienced ImageMagick users) or provide hints to explain the meaning of each option.
2. Raster effects are not the only ones to suffer from it, but here goes: effect dialogs inherit caption from menu item name. In several cases the caption is too long and is shrinked. This is not quite visually appealing. Two solutions comes to mind: 1) automatically resize dialog to match caption's length and 2) provide a separate string to dialog's caption which translators could try to make smaller.
3. Cancelling isn't working reliably. I run "Reduce noise" on a 2200x1500 picture and when I click "Cancel" nothing really happens.
4.Should we probbaly implement a "Resize" effect too?
Alexandre