For the Nature Pack it may be a few more weeks before I’m ready to put it up on to the Trello boards, but it’s the next one on my list 
As for the interior building pieces, I had setup LOD’s on the actual interior faces to fade out at a certain distance to save on rendering performance. If you are running into issues with this, you can simply decrease the number under the LOD on the mesh to tell it to fade out when it is smaller on the screen. Let me know if you have any questions on this.
- Jacob