I'm creating iPhone app mockups in Sketch 3, and exporting them to PNG. I like showing them to clients in a realistic iPhone 6 mockup/photo.
Ideally, I would like every time I export my artboard from Sketch that it auto updates my smart object in my Photoshop mockup. It doesn't seem to be working, because each time I export from Sketch, it's essentially overwriting the same PNG file (filename stays the same) that's being referenced in Photoshop.
In mockups where I'm always directly editing the same PNG and re-saving it (not overwriting it), it will ask me if I want to "Update Layers" in Photoshop...essentially saying that it sees that I've made changes.
Is there a way to accomplish what I'm trying to do?