Yes StoneVox fully supports Stonehearth models.
- Navigate to you mod’s folder (here is a list of possible paths… most likely the first one)
- C:\Program Files (x86)\Steam\SteamApps\common\Stonehearth\mods
- C:\Program Files\Steam\SteamApps\common\Stonehearth\mods
- open up stonehearth.smod with any archiver.
- WinRAR is very good but not free
- 7-Zip does it all and is free
- (basically the stonehearth.smod is a .zip file)
- once you have the .smod open…
- navigate to stonehearth\entities\decoration
- That is where most of the decoration items you’ll be looking for are
- Just poke around through the folders till you find what you are looking for
- Now the file you are looking for is a .qb file
- .qb’s store the 3d information SH uses to create the shape and color of objects in the game
- These will be the files you will open in StoneVox, and edit to your liking
- Simply drag and drop the file to your desktop or any folder you’d like
- Finally, open the .qb file in StoneVox
- Start-up StoneVox
- Drag and drop the .qb file into StoneVox
- Have fun modeling and making your changes…
- Files you save in StoneVox will be found in the export folder inside StoneVox’s main folder
Getting it in game
This will take some effort on your part, but is very rewarding seeing your items in game, and sharing them with the community 
Here are some tutorials to get you going in the right direction
- Question: How do you add objects to r188? - #3 by honestabelink
- [Tutorial] Basics of adding craftable armor
I also have some sample mods, which cover all sorts of topics
I’d also recommend downloading various other mods, new and old, open them up and see what you can figure out. One of the greatest learning resources is another’s work
If you pursue modding the items you create into the game and run into trouble, please start a new topic on the discourse describing your concerns. We have many community member’s who are active and know what they are doing, and all willing to help .
Best of luck with your work