Inkscape.org
Beyond the Basics Drop shadows [#filters]
  1. #1
    dhouston1000 dhouston1000 @dhouston1000

    Today I was adding some drop shadows on 5 separate objects. They were separate and not grouped. Two were flipped horizontally. The filter worked, however, the two that were flipped resulted in the shadow going in a reverse direction. Upon realizing this I went to the object to re-reverse the effect. It not only changed the drop shadow, it changed one of the others that was not flipped, even though it was not selected. I undid the my attempt and re selected the object, making sure to not select anything else and it affected the other drop shadow. 

  2. #2
    Lazur Lazur @Lazur

    That's expected behavior from the svg's viewpoint. 

    Transformations affect filters. You better elinimate those first. Remove unnecessary groupings.

    Other than that, a filter definition is similar to like a gradient definition. 

    If multiple objects use the same definition, changing the definition will take effect on every instance. 

    Unlike with the gradients though, there isn't a padlock icon to click on to create a new filter whenever you tweak a selected object ('s applied filter's definition).

    There is no gui for that though; can only work on a "global" filter definition in the filter editor, as they are not object specific.

    To avoid this behavior -which is, 99% of the time is to be expected- you need to duplicate the filter definition and apply the duplicant on your selected object. 

    In the case of drop shadows, I'd rather have a single definition though.