Raise bathtub? Raise a section of a room?

[nelsaadi]

Another relevant application

In the attached picture :

The plank is a soffit
The formwork and the concrete are two polylines converted to counter/slab.

Create the wood one first
Copy/resize (use concentric resizing) to create the concrete one
change/convert both to counter/slab with the concrete solid height set to 1/16 inch higher to get the result shown


Good luck