Given that most of my work currently revolves around Unity, I have recently become a bit more active in the unity3d tag. Most of the questions use some form of C#/UnityScript/Boo and are simple enough to answer.
Problems arise when it's not necessarily a script that exhibits a problem. A lot can be done inside of Unity by hooking scripts (or components/MonoBehaviours) to GameObjects which are nodes in a tree. There you leave the realm of programming to some extent. Or you rather enter the realm of visual programming perhaps. Problems might well arise due to your particular tree structure, the attachment of components, or settings entered in a UI/Editor instead of a bit of code.
I have been tempted to ask for a small sample project in several cases, to be able to open them and have a look. The user could share it online, and in many cases the problem is trivially demonstrated and easy to resolve. But there is no real guarantee that the file will remain available, and you can't really see what the problem is from the visual content of the question alone. (This of course besides the generally iffy practice of opening unknown content found online) Of course proposals have been made regarding SO/SE-hosted attachments, but those have been unsurprisingly and understandably declined.
Alternatively one could imagine asking for screenshots of the situation, but that gets messy and complex quite fast.
So the question I have is, how can we support cases like this without ending up with tons of questions that no longer demonstrate the original problem? Are there other tags/communities of SO I'm unfamiliar with, which have solved a similar situation in a reasonably supportable way? Is there a good practice to recommend and perhaps even to include in the tag wiki?
Granted, some might argue it's no longer a programming problem at that point (I wouldn't agree, but opinions can differ). Even so, I still think it's something to consider. Deferring such questions to a site like SU as a general software usage problem doesn't solve this situation. (Well, other than it being their problem from then on. ;) )