As far as I've experienced and seen in the tutorial videos, you have to open each individual PSD with the placed objects and update the layers. Once you have the file open, there's an "update all" feature, but I'm looking for a way to automatically update the closed PSDs as well, which I haven't found.
That's too bad. Can't you record the update all function, create a batch, and run through all the psd files?
Btw, the Photoline betas now also include a placeholder layer that instantly updates when the user changes the externally linked file(s). If the file with the externally linked content is open while changing the file(s), Photoline automatically senses the change, and will update accordingly. No need for an update function.
I wonder if the Photoshop devs could include a similar function for their linked smart objects. It would simplify life.
I tried the action + batch approach and it seems to work. That's helpful for now, thanks!
In Adobe's implentation, if you update a linked object file while other files that link to that object are open, then the files will automatically update. I think that's what you were describing with Photoline. It's the the auto-updating of closed files that is the issue.