
if you could do it I doubt it would do what you want it to do. filters tend to work on one pixel by examining the pixels surrounding it, but a filter applied to a layer wouldn't be able to take into account the layers underneath.
you can do clever things with adjustment layers though, that can fake a lot of filter type things - adjustment layers do apply across all the layers underneath them. I'll see if I can find a tutorial
( ,
Thu 4 Mar 2004, 12:27,
archived)
you can do clever things with adjustment layers though, that can fake a lot of filter type things - adjustment layers do apply across all the layers underneath them. I'll see if I can find a tutorial

some good tutorials here
www.planetphotoshop.com/tutorials_effects.html
I'm sure I've read one that might be what you're looking for. the "Fun With Effects: The Saga Continues…" one might be promising
( ,
Thu 4 Mar 2004, 12:30,
archived)
www.planetphotoshop.com/tutorials_effects.html
I'm sure I've read one that might be what you're looking for. the "Fun With Effects: The Saga Continues…" one might be promising