Imagine a statue. Now imagine if we could make a custom sculpture based on a set of predetermined options. Right now we are able to create a painting externally and then port it into the game. What if we also had the option of creating a custom sculpture, and then porting it too?
I'm thinking about a simple interface that lets us select a series of preloaded forms, like trees, weapons, people and animals in different poses, determine it's size, lightning color, and then generate a recipe to build it in the game. You've seen the community paving art; just think what sveta or the emerald city people would create with that feature.
This would allow us to create, for example, giant tree statues out of malachite and gold, colossus fitting of a kingdoms prestige, and various ambient decorations for our villages (including the means for large chess pieces).
In short what I'm asking for is that we be able to build statues of stuff of which you already have 3D models made.