I saw examples on X of people building amazing things with Three.js and models, and I figured out how to build them myself. But the results are mostly low-poly materials and crappy animations (pretty sure because I am not the best at these things). I thought it was my prompt (it was detailed), but it seems to be mostly a limitation of the models.

From all the examples I've seen, Astra does it really well, and I suspect it's because they wanted to attract game designers, so they trained the model more on 3D, animation libraries, etc.