Seems to be LOD issues in Tranquility Lane with the tree's popping between types.
Was reported in the chat by Zeak, checked it myself. Vurts is NOT installed by either of us ;)
Chuck says it was usually an issue with the Canopy Shadow, however I did not get this problem in the last release... so I don't know what's changed with the Speed Tree thing. I will check Oasis too, however I didn't get this issue there with the last release either.
TTWFixes nor RWL touch Tranquility Lane or the Tree's in any way.