Two questions... I am working on a script that can run for a very long time. I see in the pdb that there is a cancel callback. Can anyone provide examples of how to use that? My plugin involves the use of a mask layer parameter. I see some (non scrip-fu) plugins restrict that type of parameter to one that "matches" the size of the active layer (an example is in the lighting render). Any idea if this can be dome in script-fu? Thanks, -Rob A>