5 Replies Latest reply on Jun 10, 2011 2:48 PM by Rick Gerard

    masking particles? big pic with only a small bit showing, only want particles on visible area

    jarretv

      I have a large image which is much more than the canvas size of my document.

      It is a B&W image and has an alpha channel so that only a small part of the image is seen.

      I want to apply a snow particle effect to it but I want it to only show up in the areas

      where I have something showing.

       

      Right now the snow shows up over the entire document.

      I have tried adding a mask using autotrace but it still shows up everywhere.

      I have tried pre comp and same deal.

      any help much appreciated.