I have placed a photo into the Illustrator. So I created a shadow (by Drop Shadow from Effect>Stylize) for it and I want to remove a part of this shadow. How do I do this? Eraser does not do it.
There is no way of actually removing it; you would need to either draw a shape and use it as a clipping mask (Object > Clipping Mask > Make), or create a separate object that excludes the part you don't want shadowed, place it under the image, and apply the shadow to that instead.
I tried to do it by creating a shape and using Clipping Mask, but there is a problem: The original image and its shadow are at the same layer and I can not separate them at all. The boundaries of original image and its shadow are not exactlty the same and when I use clipping mask, Original image boundary, Shadow boundary and the Shape boundary clips each other and part of unwanted shadow is removed, since boundaries I can not select only the shadow.
There is no way to select only Shape boundary & Shadow boundary. When I select on the shadow, the original image is selected.
See the file attached:
If I can seperate Shadow and the original image, then I can do it by creating a shape and using clipping mask. Is it possible to separate a shadow and original image?
The Drop Shadow effect is always tied to the object you applied it to. It is possible to separate them by choosing Object > Expand Appearance, and then mask out the separate image created from the drop shadow. But I think expanding the shadow rasterizes it, so that it is no longer resolution-independent. But if it works for you, expanding the appearance is one way.
Another method is to is duplicate the original and blur it, so that you create a shadow version of the original, then stack them. The picture below shows a rectangle with the Drop Shadow effect, on the left. On the right, the top object is the same rectangle with no effect, and the bottom object is a duplicate of the rectangle with the Gaussian Blur filter applied at 14px. Arrange those two as needed, and now you have an object with a separate shadow version of it (which would work better if the Fill was changed to Black). Now mask out whatever you want of just the shadow object.
What is your idea Doug?
To separate the object and the shadow: Object > Expand appearance.
The shadow options are no longer editable then of course.