This is a mod that is supposed to be a remake of a Hut editor that was shown in Spore's demo, right?
These might give you ideas on what the hut editor should have.
(Even though this was from Spore's 2005 demo, it gives you detail on what the parts of the hut editor should be)
I actually didn't know about what the hut editor was like, good to know that my proof-of-concept is similar to the old one.
New update coming out soon, it makes the huts save as buildings instead of creatures, allowing players to view them, albeit without textures, since I don't know how to make them work.
Hopefully, someone with more experience with C++ will find a way to make custom huts usable and to make them keep their textures outside of the editor.
I tried using building skinpaints, but the textures were just broken as skinpaints.
I made a thread in the "Mod Help" subforum about it.