I do only if a large part of the picture is from one particular scene or centered around a specific prop. But mostly I just can't remember who did what. And in some cases I am not sure if the content providers would even like to KNOW about that kind of picture existing ;)

Occasionally I get an email or PM from someone who has used my stuff. In those cases I do my best to see what they've made and if it's in a gallery where I CAN comment, I usually does, too.

I've done the occasional Vanity Searches in the galleries here, and only seen my things a fraction of the time compared to the numbers sold. Then again I have many things in my runtime I either bought or downloaded for free because of it's "WOW COOL" factor - yet never actually used it in a render (yet) and I bet that's the same for many here :)

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You just can't put the words "Poserites" and "happy" in the same sentence - didn't you know that? LaurieA
  Using Poser since 2002. Currently at Version 11.1 - Win 10.