What's wrong with the "show background" option of the liquify filter?
Hello everyone and sorry for the crazy title haha. I don't undertand the behaviour of the liquify filter "show background" option.
Let's say I have a smart object. I apply the liquify filter and I can switch from the original image and the modfied one with the option. So far so good, but when I confirm my edits and I open the filter again for further editing, the "show background" option doesn't work anymore, so I can't see the original image.
Fine! So, I duplicate the modified layer removing the filter and now I have the modified layer and a copy without the effect. I open the filter again and surprise, the "show background" option works again EVEN IF I choose to use the modified layer from the dropdown menu instead of the copy one.
At first I thought ok, once I apply the effect the edits become somehow permanent so I can't switch to the original image anymore (clearly I'm talking about the showing option, we all know a smart filter is a non destructive edit), but then... why can I do this only if I duplicate the layer? I mean, once again, I make a copy on purpose, and then I discover BOTH LAYERS WORK to see the original image, no matter which one I choose.
So... can someone kindly explain this to me? Thanks!
