I have to “flat” from 3D to 2D.
The problem is that I need flat it without changing the original dimensions. For example the “flatten” command of Autocad in not good because doesn’t save the original measures.
The final result should be something like in this imagine:
what do you mean by changing the original measurements? that it remains proportional correct?
or just squashed down parallel with the exact 2d boundaries? try ProjectToCPlane and click on the view you want to have it “flattened” to. that will give you a parallel projection without changing the boundaries