Regarding the Nina birth event - it was my first attempt at that.
The engine and character model tools allow nearly unlimited manipulation of the individual sections and sub-sections of the skeleton and skin. At the time of rendering, it was the best I could do. The clipping was unavoidable with the knowledge I had during the construction and execution of that event. We knew it was a bit obvious and wonky, but overall passable.
Since then, I have improved significantly.
There's a balance to be struck with stretching a limited-pixel region beyond the original intended purpose or design. Something similar happens soon that is a vast improvement and shows just how much better I am at using the tools available in the studio we design these scenes within.
While we could go back and "fix" the existing images and animations, we are focused on moving forward to finish as much of the game itself as we can. Perhaps once we reach our final scenes in an epilogue, we may return to fix such things.