Cliff
Actually, I don't agree with some of the above concepts
The first thing you should understand is the difference between the 3D objects and the entities developed in the Punch main program
A staircase developed in the 3D workshop has the same properties of a 3D chair, this means that they are objects
Punch uses the concepts of information management, so if you create a staircase in the main program, the materials will appear (and you can modify the characteristics) in the Framing Editor. And of course, this information will appear in the Estimator. These events, as I stated, will happen only if you develop the staircase in the main program, not with the 3D workshop
Turbocad is a good CAD program (I use it), however it is not a home design program. A CAD program and a home design program mean 2 different concepts. The focus of the CAD packages is on drawing and precision, the Home Design programs (like Punch) are focused on design. This means that if you draw a rectangle in CAD, this can be a wall, or a machine, or just a rectangle. In Punch, a wall means a wall, it will have all the properties of a wall and you'll see a wall in 3D. The difference is the program's capability to understand what you are drawing.
Now, lets see your staircase issue, again.
Please check the image attached
To use the convert to tool to create a curved staircase, you need to create the right 2D shape--> in this case, I used a 2D curve (one of the tools of the detail tab. I added a rectangle to show the floor
I converted the curves in 2 staircases and the rectangles in 2 floor pieces (12").
Say the rectangles are showing the upper floor of a house
The unit of the left--> the top of the floor is at 96"--> therefore, I selected the staircase--> properties bar--> I set the height of the staircase at 96"--> you can see the staircase specs below the first step (width, # of steps, etc)
The unit of the right--> the top of the floor is at 140"--> therefore, I selected the staircase--> properties bar--> I set the height of the staircase at 140" (as you can see in the image)--> press ENTER in your keyboard--> you can see the staircase specs below the first step (width, # of steps, etc) --> these specs are different from the unit of the left
Other specification as the steps' properties, skirt walls, etc can be set also in the properties bar (always press ENTER in your keyboard after a modification in the properties bar)
So, as you can see, there are more resources in Punch than a 3D image ;-)
Hope this helps
Patricia