Hi,
In the last global game jam, my team used the Asset Server to control our sources. I noticed that when committing changes to scenes, the ‘compare’ button would load a textual representation of the scene file that allowed us to see the changes that were made.
When working with external source control, this option is not available as far as I can see. It would be really helpful if it was. Does anyone know if it is possible? If not, is there a wishlist item for it?
Small update : I attached an example file that opened in tortoise merge. You can see that it is textual, describes a scene fully and would be possible to merge changes if we had access to this…
488366–17154–$tempFile.txt (7.42 KB)
It’s not available to external SC, and it’s also not consistent (in the sense that you can’t actually merge scenes, prefabs, etc). There’s an issue open for it on feedback.unity3d.com though, perhaps you could add your vote (or all 10!) 
http://feedback.unity3d.com/forums/15792-unity/suggestions/250110-editor-text-version-of-unity-file