Would it be possible to create an internal image viewer plugin for Sublime Text 3? I noticed in their forum people have mentioned it not possible for ST2 due to the fact that the API doesn't allow access to the UI and widgets, but just wondered if it was still the case for ST3?
There is nothing yet in Sublime Text 3. It would be nice to preview the image and its dimensions right inside of sublime. For now, you will have to open in finder/browser/whatever you use.
Sublime Text 3 internal image viewer