I am wanting to split my model into 2 separate models. This is so I can put them in 2 separate viewports, so they can have different ZIndex’s.
Reason for this is, for example
BottomHalfModel.ZIndex = 1
UIFrame.ZINdex = 2
TopHalfModel.ZIndex = 3
This would allow me to have UI gradually appear as the top half flips open, instead of having to do tedious scaling and sizing, which I’m having to do now, but as you can see it’s not great.
Problem is, I don’t know of a clean and tidy way to get it so both models line up continuously and tween together, etc. when I’m having to use 2 separate viewports for them.
Would be cool if parts could have a ZIndex inside the Viewport 
unfortunately, suggesting that option would return in someone giving a bad excuse to not have it added
EDIT