Did you know that you can edit Photoshop Smart Objects without using Photoshop? This was something that we discovered recently when working on a project for a client.
A full video tutorial of how you edit the Smart Objects using Affinity Photo is shown below and it works in the same way in Affinity Designer.
Alternatively if you are looking for a free way to edit Smart Objects it is worth taking a look at Photopea. One issue I have found with using that this online image editor is that it struggles to open larger Photoshop files but works fine for smaller ones and is easy to use, so worth checking out if you can’t afford ther Affinity Software or Photoshop.