How to add more render tree filter?

And a non-flippant answer would be: 

If the Filter is useful to you but you have ideas about how to make it even more useful feel free to post a Feature Request over on 

https://feedback.photoshop.com/photoshop_family/

Try to make a clear case about what you want to be implemented/improved and how this would benefit you and other Photoshop-users. 

There are no guarantees about feature requests being implemented but straightforward arguments and the votes of other users might help justify the effort. 

The flippant answer might be: You could study informatics, learn C++ and see if you can’t create some yourself. 

But what are you after exactly? 

Because quite frankly I suspect that applications dedicated to 3D modelling (and particle generation) might provide superior results anyway.