Take it

If you want a perfect 3D view and you don't care about the size of the file, you have to make it like in real life: combined piece by piece.
You will see you will have to accept some compromises.
The perfection exist only you make it.
SH3D is good to show to constructors what you want in final, not to teach them how to do.
For colors and nuances I recommend to listen your wife.
It's good for your health.