My theme has a slider widget that allows the end user to select a category and it assigns the posts in that category to the slider. If a post has a featured image, its used as the background of the slide for that post.
However, there are cases where the featured image on the post itself needs to be different that the one used in the slider.
What are some options for a workaround?
Ideally, I'd like to just create a clone of the "Featured Image" panel, calling it "Slider Image". How difficult would that be?
What files do I need to clone? Any plugins that already do this?