Nope that's completely doable, its just that there's no good way to implement it easily.....yet.
Then as far as "high quality textures" go you should be be able to use them via U, and Y displacements. And as far as ease of use goes there no reason why tools cant be developed that anybody can use, but some people would rather focus on the broke easy way out.
It may be broken now, but do you honestly think it was so bad ?
(admittedly it would have been nice to be able to load a model but whatever)
There was nothing wrong with it; in fact, I think it was a cool idea that was implemented nicely. I don't think the devs had intended for this to be a replacement, do you?
It is a really cool feature, but I don't like needing to use files outside of the .cap when can avoid it.
this doesn't need to turn into a "box vs. sprite" community divide, does it? can't we all get along ?