After Effects allows for the use of one layer from the same project to be used as a displacement map for another, with live manipulation of the values being displaced. Can we get some love in Photoshop for something similar? Even just removing the additional step of saving a seperate PSD before you have to guess what amount of pixels you are displacing the object(because there's no live preview for this filter) would make this less arduous. Live preview of the displacement would be a godsend.