Actually rebar does come smooth also.
Ask any Canadian or anyone who designs for cold climates. It is used where regular bar will act like a file to ream out a hole when expansion and contraction is too much. Dowels mostly. It was code in the olden days. I don't know if it is now or not.
ArchiCAD Help indicates to me that it is not possible to create Complex Profiles with a smooth curve.
There are some magic wand settings that do a better job than others.
For example. "Best Match" does not give you the best curve fit as it would seem to indicate.
The smoothest setting I can find is never using the "Best Match" setting.
perhaps something is wrong with the program. ?
The smoothest profile curve I can get is with magic wand settings for Trace Method set to Linear Segments.
Why does this have anything to do with the Magic Wand settings anyway?
ArchiCAD 25 7000 USA - Windows 10 Pro 64x - Dell 7720 64 GB 2400MHz ECC - Xeon E3 1535M v6 4.20GHz - (2) 1TB M.2 PCIe Class 50 SSD's - 17.3" UHD IPS (3840x2160) - Nvidia Quadro P5000 16GB GDDR5 - Maxwell Studio/Render 5.2.1.49- Multilight 2 - Adobe Acrobat Pro - ArchiCAD 6 -25